A few questions

Ok, well I plan on possibly buying a steam account soon and I have a few questions, main one being that if the account I buy gets disabled, will my main account, the one with all the games I bought myself be disabled as well? If so is there a way to prevent this from happening that works 100% of the time?
Also how likely is it that if I buy an account from a trusted user that it will be disabled?
I saw a few tips in a stickied help thread here but I just wanted to make sure, thanks for your help guys and sorry for the possibly stupid questions xD.

 

If you buy a Steam account from here, there is a chance for it to get disabled(don't know how big it is though ), but your main will keep untouched. Even if it should get disabled, then just contact Steam Support with Proof of Purchase and you'll get it back.