Because it makes you an accomplice in a crime? I mean, it's not like these things slipped through the system: you were alerted to them, you took an action, you

Because it makes you an accomplice in a crime? I mean, it's not like these things slipped through the system: you were alerted to them, you took an action, you claim you reviewed them, and that you are fine with them. That is basically a statement that you are fine with being complicit in a scam.