Not really. The idiots don't want to take 5 seconds out of their lives just to check the player list.
Or they're too dumb to figure out how to turn on IDs in the player list.
Anyway, a good way to make use of this idea is to check how good admins are at servers. For example, you pretend to be a new player, join a server, and see how they react. If they help you, they're good. If they say "loeloel gtfo n00b11!" then you know it's a bad server.
But what you're doing is just stupid.