Originally Posted by
Tziva
My one caveat for agreement is that a tanking spec is really only necessary at higher levels. Of course, it's very helpful all the way up, but I've also seen people freak out in PuGs because their level 20something tank wasn't spec'd prot. Don't be that guy. At that point, you're so few points into your tree that your talents are almost negligible anyway (also, how terrible would queues be then? While those of us who level as tanks or healers exist, we're few and far between) . Also gear: there is no tank gear at level 20, guys. As long as he's got a shield, he's fine.
After level 40 when you can have dual spec it's silly not to, and once you're into any of the expansion contents you really need to be tank spec'd, for the sake of your healers if nothing else.