[quote=@Shienvien]
[quote]Hide or remove the posts of non-playing players (for players that have left/been removed from the RP, the ability to remove (or just hide if you want to reserve deletion power to mods) posts that disturb the RP's flow would be useful.[/quote]
Also [b]no.[/b] I am *very* against anything that means that any of my posts could disappear randomly just because someone decided they don't like me anymore. If someone is causing actual trouble and insulting people, only then should mods be called and removal be applied - and personally I do prefer hiding just to avoid and solve later disputes. Both players who ask to go over the situation *and* unjust mods [b]will [/b] happen on site of any noteworthy size. 
[/quote]

I respect that view. I also know there are players who join an RP, create an elaborate set of plots, and then disappear just as their character becomes critical. It's jarring to the casual reader and to other players. I'm not sure what the best solution is, some GMs are very hands on and careful about the story flow, while others just let players do whatever. This kind of thing would cater to the former, but as you indicated, could be easily abused. On the other hand, having no recourse means that a troublemaker can easily enter an RP, post something nonsensical, and then even after their removal the GM would be powerless to hide or remove their distracting post. 

Is this something where a mod would be needed? If so, then you have the other consequence of taking the decision out of the GM's hands (and the GM runs the RP, not the mods). If the mods are simply there to carry out the GM's wishes, then what's the point of not allowing the GM to perform that action in the first place? Who has the power here? The GM? The Player? The Mods? Nobody? 

So either in the case of a disappearing player whose absence creates an awkward void in the story, or for a troublemaking player who is intentionally disruptive, I can see a need for this kind of ability. I also understand your concern. What if posts were hidden in ways that left a placemarker in the thread, allowing anyone to view the true post if they so chose, but letting casual readers and players to skip by unnecessary posts?