[quote=@Captain Jordan]
<Snipped quote by LegendBegins>

And if you restrict that, stupid GMs will just find another way to break up the group. You can't fix stupid, stupid will always prevail.

This is a reasonable measure that allows GMs (the vast majority of whom are sane, stable people who won't arbitrarily kill a roleplay) to manage the list of active roleplayers. For some GMs, this can be mission critical. For others, they might prefer the earlier suggestion to opt out of the feature and let just anyone post in the IC (i.e. not manage a roleplayer list). 
[/quote]

But removing someone is on par with a personal attack. It's much easier to justify not allowing someone than it is to justify eliminating them. Regardless, on the other side of the point you make, a self respecting roleplayer will leave when asked. If they do not, then it is a problem for the mods, not the GM. It would actually cause more trouble for the mods if the GMs can kick someone out, because there will be many unexplained removals, to which the RPers will appeal.