I think that flames has been proposed enough times, and of course denied enough times. Although I don't know the exact circumstances for which the request has been veto'd, I'm pretty sure they run along the lines of a) Player Harassment b) Underage Influence.
Player Harassment is something that Planeshift definately tries to discourage. My entire stay in planeshift has been a very calm and friendly one, and that's a quality I'd personally like to keep. While often there are disagreements between certain players on and off the forums, and these quarrels may drag on and off the forum, they are usually not out of hand. Within little more than an hour, the problem is dealt with and the conflicting players often resolve their situation, or just give up. I like our friendly atmosphere.
Finally Underage Influence is something I think Talad also finds important, as does the rest of the administration and moderation team. Planeshift, I estimate, has a player population marking 40% in the <18 range. Flaming and fighting often ends up in... choice words being thrown around. So, being that Planeshift is a game filled with impressionable youth, I think it better to abstain completely from the use of explitives in and out of game.
That's pretty much it. There are kids around, dude. Planeshift isn't like alot of other MMO's out there, in the fact that the populous of Planeshift is pretty mature, calm and reserved. This is a good ambience I think, and it kind of keeps me around. There are plenty of other places on the internet to vent; going so far as games are made just for stress relieving purposes. So, go type in your favorite hate site and do your venting there. We don't want it here.