Blacklisting is also tactic used in economic warfare which can be used against neutral government and companies that operate therein. In order to compel a change in policies by neutral government and companies based there, one belligerent in a conflict may threaten to prohibit their operations after a conflict is over.
Blacklisting may sometimes result in a domino effect, as in the case of radio actress Madeline Lee. Both Lee and her husband, actor Jack Gilford, were blacklisted during the McCarthy era after it was revealed that Lee had given a party in her house to raise funds for a group later labeled as a Communist front. Though there was no suspicion that she had ever been involved in any putatively "subversive" political causes (and though her real name was spelled differently), Lee became the target of thousands of protest phone calls to her network. Another actress, Camilla Ashland, who appeared on the television show Danger, physically resembled Madeline Lee; though she had no political past, her network too became the target of protest phone calls. Madeline Pierce, a 20-year veteran of radio, who again had no political past, was also ultimately blacklisted.
There are less formal and less visible blacklists as well. For instance, an organization called "Sufferers of Iatrogenic Neglect knows of 40 cases where patients claim they have suffered on two counts: one, from the original human medical error, and two, because they complained about it and as a result got blacklisted. In West London, Rafat Saeed had difficulty finding a GP and says, “… it is very easy for a doctor to blacklist a patient through the Family Health Services Authority” . Angelique Omega wrote in her blog, "I was once told in a phone call by a Renown E.R. nurse, after she very quickly looked up my name in their computer, that I'd better not ever show my face there ever again. This was after I had filed complaints …
Data sharing also can cause patients to become blacklisted. Data sharing makes it easy to get labeled as a "problem patient" without anyone adding a name to a list. Repeat patients who are misdiagnosed or undiagnosed, or patients with chronic conditions or mental illness, can get labeled as "problem patients" in computer systems such as HealthConnect or Epic that hold the records of patients and can make it increasingly difficult, if not impossible, to get appointments for care. Such systems have no borders making this a global problem .
Even without data sharing, collegial loyalty, watching each other's backs, can be enough to result in the denial of care to certain patients. Consider the patient who has been injured by a healthcare provider. Patients with iatrogenic illnesses often cannot get a record made of their injuries and often cannot get treatment. Trudy Newman in her article "Deadly Medical Practices" described the cause as being physicians having a stronger allegiance to each other than to their patients. They are reluctant to acknowledge the existence of iatrogenic injuries by diagnosing or treating them. A patient with iatrogenic injuries can go from doctor to doctor to doctor without getting diagnosed or treated and never know why. Without a list or any communication between physicians, collegial loyalty by itself results in patients with certain kinds of problems being blacklisted.
However, the term blacklist does connote volition or willfulness. A new and unrecognized disease resulting in patients being unable to find treatment might not be considered blacklisting unless inclination or personal belief or the equivalent had to do with why treatment either was not found or was unreasonably difficult to find.
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