Great point. I've wondered whether the sins of the person who gives me sats could in some way affect me, but me sending a potential murderer money via cashapp still has no direct link to my bitcoin (I believe). If they hold a gun to the guys head and ask him to divulge the identities of random lightning users, what info does he have? A fed, could pose as a seller once they have my cashapp information, and send me dirty coins, but lightning and liquid do a good job of mixing the trail.
Don't get me wrong, I don't think I have it all figured out. I'm just trying to process through the best viable options. Open to correction or info.