FOR THE LOVE OF GOD READ THIS ANNOUCEMENT IF IT'S THE LAST THING YOU EVER DO IN TF2. (Before a scrim)

STFU unless you're talking about something useful.

E.G. Whereabout of enemies and or sentries.
Strat reminders (ALTHOUGH YOU SHOULD KNOW)

So you get the idea, none of this ♥♥♥♥ we have going on now.
"i walked into that rocket, wtf"
"That's what she said."
"OMGOD IM SO 1337 watch me play like a douche!"
"what am i doing again?"
"This sucks" < specially that one (get over it, learn from mistakes)

Play like a team!
Although you should be knowing your enemies postions better than your own, you should REALLY know where everyone is, what they're doing.
Also, if your doing badly, think about what your doing wrong, remind yourself and try to avoid that.

Note: We are going to be posting player lists. You practice that player as if your life depended on it. Because it now does.