Yes I know,
Providing that thread ID remains the same, you can pretty much write anything and it will lead you to same page.
This is as serious as it gets in your offsite forum reputation, your branding etc...
Imagine someone placing a link on his site (your competitor's site) with an URL
http://www.yoursite.com/forum/showth...-black-hat-seo
I reported this bug, but nothing yet from vB team.