How do you keep track of members?

[onehost]

If you are looking for suspious actvity, then how do you keep track
of your members? Is there some type of mod that I can install to
keep track of what members are doing, notes on members, etc?

I notice that vb does not seem to gather info on any one place.
I was looking up a members IP, and was surprised to find out
that there was nothing related in the members account concerning
this IP the member was using...

so how are you guys keep member info in check, and
maybe even cross refererenced with other accounts that
could very well be spammers, duplicate accounts, etc...

Is there any helpful mods out?