Our Public Middle School league has rules that require:
* Man to man defense
* no trapping or double teaming except in the paint/key
* Full court pressing is allowed until a 15 point lead.
* No "clear out" offenses. (Which, if i remeber the handout correctly, is interpreted is having one player isolated 1 on 1 on one side of the court)
My former HS JV Coach now coaches at the middle school. Whenever we play him, he pushes the limits of the man to man rule and has his players play what looks like a 2-3 zone inside the 3 point line. It seems to be a saggy man to man, but if a team set up in 4 corners, the defensive player under the basket would have no one to guard.
I told my friend that his wife should have their twins when we played this school, because I would set up all 5 players outside the 3 point line, so that he wouldn't be able to have a defender camped out in the paint. I'd also keep the ball at half court once I had a lead to make him play tighter man to man.
Maybe it's a good thing I'm not a coach.