Who/how to report vandalism? 

Hi!  I am very impressed with your ClueBot.  I logged in to #wikipedia-VAN to watch it in action, it's cool.  I often revert vandalism myself on the pages on my watchlist, and sometimes I check the vandal's contributions page to see if he/she has been messing with other pages. I often find multiple incidences of vandalism by these users, and while I can revert their changes, I have no idea to whom I can report their actions or how to go about it.  Can you provide any pointers?  Thanks!