Heh, but I'm sure most of those template hacks are never released on vBulletin.org, but probably vBulletinTemplates.com or elsewhere.
I'm just voicing the rules.

Personally, if I could have it, I'd allow template modifications to be released as hacks, as long as the templates contain conditionals, and the conditionals used are significant in their purpose, or there are enough of them. Conditionals, like PHP, are logic, not presentation that is HTML.