I enjoy chatting and staying friendly with the coaches in pregame, as I feel it leads to a smoother game. IMHO, 3 very underused words by all on the field are "please" and "thank you" and I try to use them as much as possible (example : Would you PLEASE have lil' Johny, the ball boy , watching us when the play ends and not his girlfriend; THANK YOU"). Coaches can be of a jealous lot; so don't overchat with one coach. If you do find yourself chatting with one , it's important to then head to the other end of the field and chat with the opposing coach. I once had a coach tell me that seeing the officials chatting with the opposing coaches gave him the same feeling he would get if he entered divorce court and saw his estranged wife making out with the judge.
IMHO; coaches, officials , players and the like are all on the same team. A team that loves our game of football and should enjoy playing coaching and officiating it. Try to keep the game enjoyable for all. It's a game....it should be fun!