Fake members??

[ukmma]

I get quite a lot of fake members on my site which i dont really want, most of them dont actually post anything, but i just dont want them im trying to make my Forum as genuine as possible

for example a user will create a name like aswanqvex, dezabwe etc...something that just dosent look real and when i check on them the IP address are sometimes multiples,and there all from the same place katowitz or somewhere.

Anyway ive just been deleting them daily, is there a mod that can stop these fake users from registering in the 1st place, as deleting them is becoming a bit of a pain

cheers