Team threads are permitted and are meant for discussions about the team. The majority of the content must be paintball related. If the thread becomes an OT thread, it may be closed or removed. Team threads are not private but please do not troll or instigate in another team's thread. Teams are limited to one thread. If you want your thread to remain open, please do not be rude to people who post in it.
That quote comes from the stickies in the forum where you were warned.
A couple off-topic posts here and there aren't normally an issue (unless they break some other forum rule). When off-topic posts are dominating the last couple pages, thats a problem. The team threads, as per my understanding, are there for you to communicate team issues such as practices, events, whos paying for what at events, etc.