Ybot
Blue Belt
MMA neck cranks are legal, but usually easy to defend. There was a fighter named Tim Catalpho (sp?) who was a Chiroprator, and who claimed to have a hugh arsenal of various cranks from various positions. The funny thing is that I never saw him pull them off (though I only saw a few of his fights).You can't drop someone on their head. That blunts the effectiveness of some throws. Are neck cranks illegal, or just never attempted?
Mark Kerr pulls off a vicious neck crank in Pride 10- Return Of The Warriors. This is a good show by the way, and if your into MMA at all I highly recomend this DVD.