Hit Detection?

Server Side?
Client Side?

Ok so I know, you can not please all the people all of the time
The other day 3 people where complaining I had my server set on Server Side hit detection, said they couldn't hit crap...
So I set it back to Client Side...
Today 2 guys are on and complaining I have the server set on Client Side and they can't hit crap..

LMAO!!!!!!!!!!

Ok so I am not very techy, if someone can tell me, what is the right way to set it I would appreciate that..

I was thinking, maybe they should go back to the shoot house if they can't hit crap and practice some more,

Anyway, they have peaked my curiosity! What is the general consensus?