The only reason to delete threads about legit VAC bans are to sweep shit under the rug. It will only make it stink a whole lot more than it already does.
I understand a lot of reason to delete threads, but deleting threads to sweep shit under the rug, is highly immature IMO, and serve no other purpose than to make YOU look suspicious as well, protecting people under serious investigation...
But hey, it's your site, so I guess my opinion means jackass.