I made a very negative, honest review of Revival of RO recently. In response, the sole admin responded to my review within the hour by deleting my character. Knowing how the admin behaves, including on his livestream and how he treats others in-game, I expected reprisal for this action. I had already decided on quitting the server and wasn't going to raise much of a fuss on my way out. Made a few troll posts on the Discord, was going to drop in on my character, warn people on #Main about the server, then drop some items.
But, hilariously, since he let me still have my account, the drama was brought out front-and-center in front of all the players, which many seem to be a dedicated and loyal base that have no issues with the server.
Needless to say, there was a lot of name-calling and other nonsense that went public. For some reason, he thought he was "doing an act of mercy" by giving my character back, but as I told him, I only wanted it back to give my items away (which he called noob items, because he's petty like that).
I had a little drop party with my weak items while him and his posse were trying to harass me out of the game with lame rhetorical attacks. Lots of grandstanding.
So, in summary: responded to bad review by punishing in-game, harassment, airing dirty laundry publicly, etc. Avoid.