Fuck no!
All your level shows is how long you've been obsessing over a website for, anyway. Yes, people with low levels can be stupid noobs, but only if they're completely new to the site (low level + recent signup + tiny post count).
There's a pretty easy way to tell if someone is a troll or not: READ the post. Simple as that. Just because they've a low level/postcount doesn't mean they're a troll. Everyone had a low level and post count once.
Conversely, just because someone has a high level etc. doesn't mean they're a decent BBS user either. Regulars often like to take the piss out of things and troll each other. Having thousands of exp and posts has done precious little to their love of that.
Posts should always be judged on what's actually in them, not what the numbers and picture next to it say. I don't even know why half of that stuff is displayed on the forums at all.
And if no-one agrees, I'm blaming my low level, so screw you all.