#1 I was still fairly new. If you changed your name to "Account Frozen" or "Frozen Account" or something like that, then it automatically just ices you. I figured I'd test this theory (with a spare account of course).
#2 I had AB'ed on my account and about 3 others simultaneously using proxies for months and one day my main is frozen. No reason is given so I figured I'd just give it a shot and email to see if getting it back would be a possibility. Surprisingly, they said that they have no clue why my account was frozen and they said they would give it back to me. They unfreezed my main but I had forgotten my password so I attempted the email recovery to find out that there was no email attached to the account. I email them explaining the situation but they said they cannot do anything unless they have proof that it's me. I accurately describe everything that was in my account as per their request and they still say they couldn't. After a few weeks of infrequent email exchanges, I gave up.
#3 Actually just got iced this morning for AB'ing. Forgot to turn it off last night and was in magic with some pretty retarded settings. Came back after I went out with some friends to find an RS ban, a fuck ton of good MP's, and I just sat there thinking "Well, I'm fucked."