bad experiences ?

Most of the instances where I've heard of such circumstances are with PhD programs or an MS program in which you have to write a thesis. In both of these cases, you have an advisor, which is kind of like playing the lottery in some ways. Fortunately for me, I had a great advisor when I did my Master's in engineering.

I wouldn't think that this would be a problem in b-school. The extent of the relationship you have with most of your professors in b-school ends at the classroom, aside from the usual networking, etc., since you don't have to do a thesis. Of course, there may be projects where some professors do serve as advisors, but it's not like they have any say in whether you will graduate or not. So I wouldn't worry about something like this happening.

Good luck!