Not only will it get your account banned, but your funds seized as well.
It still surprises me how many people are so unaware of the TOS of poker sites
. I mean if your willing to give them your credit card/ bank account info, wouldn't you think it is a good idea to know the rules? I'm gonna create a site and in the TOS it is gonna say, "By depositing on this site you will forfeit all current and future moneys you earn in your lifetime to me Vfranks." I'll be rich in no time!! LoL.. jk.
If you can't sit for hours through a MTT, than yes, STT or Super Turbos could be a good idea for you. Going all-in every hand is just a bad idea, and probably a sign that you could be on tilt. Find a game you enjoy playing and stick with it, you don't absolutely have to play in long MTT's to be a good player. Some people play cash games, some STT's, and some people MTT's, and some people play all of them. Also you could try 45-180 person SnG's which are kinda like a MTT without a HUGE playing field to go through, or try a less populated poker site where there are smaller playing fields in tourneys. Hope that helps.