Over the years the DonationCoder forum seems to become an increasingly appealing target for "profile spammers" -- people who sign up on the forum and fill their forum profile fields (like website, signature, etc.) to ridiculous spam advertisements for batteries or whatever.
Presumably the idea is less to get humans to see these links and text, and more to get the search engines to pick up on them and trick google-type algorithms to think that DonationCoder is linking to these sites approvingly. We have always had "nofollow" tags on these links which should eliminate that, but who knows.
Anyway, i've recently made some modifications that essentially block all such links from forum profiles and in post sidebars, until the forum member has actually made a few posts. This will give us an extra little bit of time to ban people and should serve as an additional disincentive to going through the trouble of creating these spam accounts.
Let me know if you spot anything strange on the forum as a result of these changes.