“Questionable activity” is an easily abused term for power-tripping assholes. Especially with right-wing politics becoming so prevalent world-wide, it’s easy (for example) to imagine a scenario where a group of LGBTQ+ types are targeted for harassment - being forced to choose between losing their safe haven or outing themselves & putting themselves at risk of far worse.
Methinks you have too much faith in those wielding the power to demand this. Examples abound of assholes - anyone from forum mods to police officers - abusing their power against those they look down upon. Yeah, it often comes back on them eventually, but not always, and in the meantime the lives of those they target can be made a living hell if they so choose.