I can personally confirm action will be taken, as I've reported a few servers spread out on multiple hosts (Vilayer, Fragnet, etc). I once even went as far as to go back to the reported server after being told action was taken. Result: I was no longer being kicked by the admin for only joining the damn server (it was a clan server, and somehow they thought it was ok to kick anyone not in their clan so they could loot freely). Instead, the admin asked nicely on global voice to leave the server, lmao... BUT, they didnt kick :) Most hosts have some kind of a 3-strikes policy anyway, but reporting them DEFINITELY helps. Unless you are actually being a dick of course :p