How many spammers do you host ?

As a freewebhost it's almost impossible to keep track of every little thing that's on your server and with out question there will always be a spammer. How many accounts on a weekly basis are spammers on your server and how do you go about finding and removing these spammers.

At the moment I host 0spammers but on average I seem to get about 3per week and they all seem to sign up on Wednesdays...Spamers cause massive email problems to servers and are the fastest way to get you blacklisted when will the spamming end....

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