You would think this question, AAS use, Getting tattooed within the last year ect would be no brainer questions to lie about but you wouldn't believe the amount of people that answer some of this shit truthfully.
With all the things that disqualify you from giving blood, I'm sure there are a ton of people that lie before giving blood. Hell, most of America is on meds for something and the list of disqualifying meds they have for giving blood is two pages long.