First, this is great information in an area I know very little about.

But I’m curious - from your experience - how do you know the OP isn’t pretending in order to learn about new avenues to block or attack or to track down people who are trying to circumvent?

I don’t mean that as a “be careful”. You’re the expert compared to me and for all I know these are unblockable. Or maybe those doing the blocking would already know about them? So I’m interested in just understanding more.