Most of the people your products are being misused to stalk can't even turn off their location sharing because the person who's insisted they install the app/hardware will assume that doing so means they're off spending time with someone else, or whatever their personal paranoid fantasy is. Why would someone being subjected to that contact you? It would just enrage whoever is monitoring their movements when their account was suspended, or whatever your process is.

The people misusing your products in that way don't think they're doing anything wrong, so they're not going to hesitate to have you verify their ID.