They scare the living shit out of me for a couple reasons...
Do they believe truly that taking the money of gullible, desperate, people is the Lord's work? IF yes, they are as much fools themselves and should not have that kind of weird power... if no, they are assholes out to make a buck.
Religious institutions, like nonprofit organizations, should not have that high an overhead. People donate in good faith... but where does the money actually go?