Odd activity by new users

[Obi-Spud-Kanobi]

Over the weeks of moderating a licenced vB forum, I have noticed a lot of new users (Spammers) log in and instantly go to viewing their account. They are now rarely modifying the details within it but just sit there for quite some time before logging off! They even do this while under a ban too!

Question:

Have they found a means to exploit the forum in which to move from site to site thus creating a chain in which to hide their source IP identity?

I did ask (via email) this question but as I am just a moderator and not a licence holder, I was treated with contempt!

Secondly, moderators and users that generally have a concern where they feel a software exploit is worth bringing to your attention, should at least be able to do so without feeling their observations/concerns are worthless unless they have paid for a licence.