These were collected and released in LP audio collections such as Pardon My Blooper! and Your Slip is Showing, which were briefly popular in the 1960s. A movie version also entitled Pardon My Blooper was released in 1974. These led the way for such current TV shows as TV's Bloopers & Practical Jokes, hosted by Dick Clark. Schaefer himself gained minor celebrity under the nickname "The Blooper Man".
Schaefer has come under criticism from TV and radio historians who have noted his deceptive presentations in his albums. If Schaefer could not obtain an actual audio recording of the event (as many of these bloopers occurred live and were not always transcribed onto recordings), he would simply hire actors and recreate the event — without offering any disclaimer. This led to some misrepresentations. For example, the blooper by Harry Von Zell described above was not recorded, so Schaefer recreated it. Had Von Zell's mispronunciation occurred as the President was being introduced to an audience, as presented by Schaefer, it would have been highly embarrassing. However, Von Zell's blooper occurred at the end of a brief presentation in honor of the President's birthday, which, while still embarrassing, was not quite as mortifyingly so as President Hoover was not present.
Schaefer is historically remembered for an unwitting libel he committed by dramatizing an incident that never happened. In his vinyl record Pardon My Blooper!, Volume 1, Schaefer replicated the famous radio show host "Uncle Don" Carney, who broadcast on WOR in New York City to millions of children from 1928 to 1947. In Schaefer's brief drama, Uncle Don mistakenly believes his microphone is off, then utters a contemptuous indecency.
Schaefer's motivation to recreate Uncle Don included widespread popular rumors, some surprisingly misremembered testimony, and a contemporary, though probably false story in Variety about one of Uncle Don's many imitators. On April 23, 1930 Variety reported that "about two weeks ago" an unnamed children's bedtime story announcer at an unnamed station in Philadelphia had blurted out — after the show had concluded and he believed the mic power was off — 'I hope that pleases the little b_______' (sic). But — Variety claimed — the mic was open, the Federal Radio Commission was listening, bundles of complaining telegrams arrived, and the announcer was fired. Indecent language used in front of women and children carried great opprobrium in 1930, yet this stunning story did not appear in Philadelphia newspapers.
Again, no audio existed, so Schaefer recreated this blooper. Schaefer's "Uncle Don" segued from a gentle goodbye song to the children, then misopedically declared, "We're off? Good, well, that oughta hold the little bastards!" There is absolutely no factual evidence that Uncle Don ever said this, and Schaefer's false recording has perpetuated an unflattering urban legend that the real Don Carney had spent his life denying.
Another example of a recreated blooper stemming from a second-hand report is that of a Canadian announcer stating "This is the Dominion network of the Canadian Broadcorping Castration," which utilized one of Schaefer's voice actors. This alleged error has also passed on into urban legend in Canada, although it has never been confirmed as to whether it ever occurred.
Not all of Schaefer's bloopers were recreated; one of his Pardon My Blooper albums, for example, included a rare outtake from a Bing Crosby recording session in which Crosby good naturedly starts swearing at his producer for changing the arrangement of the song he was singing. By the 1950s and 1960s transcribed recordings had become more commonplace, particularly for news broadcasts, so Schaefer was able to include genuine recordings of some broadcasters, particularly the aforementioned Paul Harvey and Lowell Thomas, the latter being featured on several occasions.
At least five Pardon My Blooper albums were released in the late 1950s-early 1960s. Many of these recordings would be reissued in the 1970s by K-Tel Records. Schaefer also edited a number of books transcribing bloopers, with some books covering certain themes such as bloopers from classified advertising and television broadcasts.
After his death, Schaefer's title of "Keeper of the Bloopers" was passed to Dick Clark, who hosted and produced a long-running series of blooper specials (and a weekly program) beginning in the early 1980s and continuing until the present (although Clark himself hasn't hosted any bloopers speecials since suffering a stroke in the early 2000s). By the time Clark picked up the mantle, recordings of bloopers were far more easily obtainable, and in fact were often provided willingly by the producers of films and TV shows as a way of promoting their product. Clark also followed in Schaefer's footsteps by releasing an album of bloopers from radio broadcasts. Clark's TV blooper shows always carried a dedication to "Kermit Schaefer, Mr. Blooper", and the success of Clark's program led to the development of many imitators which continue to be broadcast as of 2008, and the inclusion of "blooper reels" on DVD releases of TV shows and films has become commonplace.