It can be abusive if used by the wrong person. But by that logic, anything could be considered abusive.

But back to my point, I imagine too many people have used this in an abusive manner, so that's why it's on the list.

someone just crash my server and i tried to kick and ban it many times but nothing happen... play as a titan that go so fast and can change to jumper to crawler etc.. while running and know what!!! he get invisible and kill who he want when he want and where he want... srry so angry right now.. (im french basically so dont judge me pls) anyway i try to figure it out and i see something on ricecancer mod!! possibly this or another new abusive mod that kill the game so hard
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* Changing max player number
* Killing all players
* Dcing Master Client
* Flashing names

Flashing names? Whut? That's not abusive. e.e
Killing all players is easily anti'd, just write in a revive-all command, or check for playerdeath and autorevive if need be (Or just prevent them from coming in the first place), Dcing the MC is sort of unavoidable, because that relies on the Photon Network, and only 1% of previous Dc's work now, and the Max Player Number, I've never run across someone who can change it without MC.
Although, I'd say that A Vivid-Assassin's MapShift is abusive as hell, and also annoying. Damage Stats (can't really bitch here, changed mine by about 10ish, so it's not SUPER big numbers, just easier to hit higher) are abusive, Anti-Ban (Pain in the ass to do, I'm surprised if someone does it) and Anti-Kick are both abusive. All Nonmc Kill Commands (Slb's /zkill, Vivid's /endall, and there's a few more) are EXTREMELY abusive. Although those are easy to cancel out, my mod does that. No, you can't have it, I'll make a public one sooner or later, but that's aside the point. There's some updates for you, and if I think of any more, I'll post them here!

Oh, ARCH can be counted as just abusive in general xD
Just a thought.