I have a good laugh when i'm playing and a dudes trying to get blocks on me.

If i ever do get stuck i usually just fist pump a nade for a few seconds. Since deaths don't count in this game.

Crouching would only work if only your head is covered. When I do it I completely encase them in a 3x3x3 block

I think I've already got traped by this bug,but I've just breaked the block where my head was and it fixed.I think that crouching should work too.

Yeah this is a known bug. I find it useful actually. When people are having a difficult time kicking a griefer, I just trap him in blocks and most of the time it will glitch him out of the server.

EDIT: Kaede, sometimes it does and sometimes it doesn't. I don't know why.

Not true. It does not make them disconnect, it causes their point of view to glitch into what is called the "hall of mirrors" effect. The only two ways to get out of this are either to kill yourself by holding a live grenade or to exit the server manually.
Read: Old news.

You can make people disconnect from the game if you cover them in blocks (because for some reason it overloads your client or something when there's blocks all over you.

By this I mean, you know how when you spawn underground or something, and your screen goes on the fritz? It's because your head's inside of a block. If you put someone's head inside of a block, it messes their screen up. Lol, I was building the intel onto a tower and me and this guy were fighting on whether or not we should put it on a tower, or dig it underground. So he covered me and blocks and I discnonected.