This is the kind of thing I open up to the league because feelings on this are going to be diverse. I'm not sure if it's possible per your leagues particular setup but since the guy wants to drop him (presumably to pick up someone he believes to be useful to himself right now) you consider adding him to IR manually until the league decides what action to take. It puts him out of the player pool and allows the guy who owns him to have the extra spot.
Excellent. Problem solved. Let this guy snag whoever he wants and just say this is a special case and we need to make sure everyone is treated with respect here including the other 11 owners.
no it's not a good solution at all. ADP's situation is not at all unique. This is not the first time an active player is facing a suspension.
How often does a player drafted in the top 5 have this hanging over their head after 1 week of football? He doesn't want him to be able to drop AP because if he plays, the person who picks him up gets a huge advantage for being top waiver priority, but the guy wants to drop him. To open up a slot. I mean you could allow the drop and put out a league wide message stating no one can pick him up until a league wide vote too. Does the same thing.
The guy with AP probably will not be able to pick up much of anyone in a waivers priority system at this point anyways. Both AP backups are probably already rostered considering waivers already processed and this broke last night. He's almost certainly not going to get anyone he can play this week. In the meantime you are not allowing him on waivers for someone to "accidentally" pick up