nope, thats not a good idea. only way to avoid sandbaggers is share your raid with trusted and known people. ex. your syndicate. I was in SOB and my old team mates always helped as I helped in theirs, and most of us opened 2 raids within in a season, and we got them all killed.
Never bothered to find out how they work andprob thinking it isa regular boss, and think to themselves OOOOhhh look how strong I am