Thread:Sannse/@comment-25222611-20141001023431/@comment-1038387-20141001201522

If by "report" you mean VSTF or Special:Contact, they don't blindly follow what the report says. If the report has any evidence of Terms of Use breaking, they'll probably investigate it. If it's just "X is mean to me and hates kittens and stuff", it's ignored. The burden of evidence lies with the person complaining. Don't worry too much about them.

As for changing IPs, many ISPs assign so-called dynamic IPs (as opposed to static IPs). Sometimes something as simple as unplugging your router for a second can give you a different IP. That's not hacking any more than taking a free sample is stealing. You can abuse it by taking a lot of free samples, but it's not illegal.

Sannse's suggestion of just keeping banning IPs, I would also like to point you to her latest blog. Never show you're upset or angry at a vandal's actions - you'll just give them gratification. Block and ignore.