“Seriously tainted” is implied to mean “if you knew about his past and continued to do business with him anyway”. Taking part in his crimes a level of evil that

“Seriously tainted” is implied to mean “if you knew about his past and continued to do business with him anyway”. Taking part in his crimes a level of evil that doesn’t even need to be mentioned — if you turned a blind eye to Epstein’s dark history while taking his money, than you are tainted, of course.