I doubt it is TFP causing your download spike. The most you get from TFP is html, and a few images (plus a few other good uses of code). But there is no reason for 30 megs of download, unless you visit all the pics in the Nonsense forum, clear your cache, and look at the nonsense forum again.
Oh yeah, you may want to checkout a good virus/trojan cleaner, like AVG (free) from
http://www.grisoft.com just in case you have some stuff that shouldn't be on there.