Xyber

" forcing people out of party chat is a good thing man. party chat splits up the team and destroys the aspect of team work. thats also what squads are doing. "

" I've been playing the "hot carl" - engineer w/ Carl Gustov + extra explosives + increased explosive dmg.  It's sick once you get used to it; can take snipers out from across an entire map, guarantee nobody disarms a charge once set, kill people through walls, etc...I actually feel cheap using it, but it is so very fun ^_^ "

It's not broken because it is up to the player if he/she wants to talk. They are probably sitting in a party and chatting with some friends or something. 
 
If you want teamwork, play with guys on your friendlist that you can talk to.