Yes, they lie!
They have been admitting to doing this in protest since the "gaystapo" got rolling and homosexual blood donations were deferred in the 80's. And there is an "occult" phase early in the viral infection during which the virus is virtually undetectable, although present. In fact, this is THE STATED GOAL of HIV-infected homos under antiviral therapy; to get their viral loads to undetectable levels.
And there is always the risk of error in failing to discard blood which tests positive for HIV.
Lying about homosexual behavior on these questionnaires, as well as actually donating infected blood, ought to be a capital felony.
yes, for those who purposely poison the blood supply, the punishment should be denial of any HIV/AIDS drugs.