oh cmon, are you really supposed to use your computer like that? constantly reformating, eraseing etc. just keep all your transaction info in your hushmail box and they can't get in..
the rest of it- browsing message boards, having user handles, having steroid information--none of this is illegal..if you get busted their looking for you & the gear, and the Gear & you, and even better-the Gear, You, SomeCash/ bank account record(so they can take you money)..the cops/prosecutor know that in this area the judge wants those things, not a computer thats cookied into message boards-thats nothing, i'll bet 95% of the time when they confiscate a computer during a bust they don't even look at it and just prosecute of the gear/you/cash .. the computer is probably just donated to state auction or whatever.