Pseudonyms: Pros and cons

The worst part about a pseudonym is that you can't take credit for your work -- which is only a problem if you happen to be incredibly vain. Another downside is that using a pseudonym in contemporary American society appears eccentric, and possibly a little paranoid.

A resoundingly obvious pro is that you are relatively sheltered from the fallout of absurd and offensive remarks. Go anonymity!
People will immediately understand that you are this kind of person however, so remarks by: "twizzle.twinkle.twilight.girl" will pretty much always be ignored.

Another thing that I have considered: given the well-know bias towards subconsciously favoring "pretty people;" if you are of average or above average appearance you should have a picture of yourself. Unless of course, you are prone to making embarrassing, potentially career-destroying statements (see previous paragraph.)
So if you use a pseudonym, do people assume that you are ugly?

Though if you depend on your pseudonym to guarantee absolute anonymity and if you broadcast a lot of information about yourself, then anyone can find out who you are and you are just another idiot on the Internet (who has probably chosen a ridiculous name from science fiction, and then mangled it.)
The good thing about making up a name (especially if your given name is common;) by making it ridiculous enough, you are the only person that comes up on a google search (of course no one bothers to google it, but that's beside the point.)

Nerd Jokes!

"I thought d(jerk)/dt was yank."

from nerdy_yo_mamma_jokes

I love that someone did these, although the black hole and gravitational jokes lack imagination.
I just might start using reddit because of this. I love reading other people's jokes, it's sort of a Lamarckian theory of intelligence: 'I can understand intelligent people, hence I acquire their intelligence.. ' (edit 2011: this is probably the same reason I watch Big Bang)

I feel so witty... I can use big words like 'delicatessen' and know what they mean.

Additionally, I can't think where I heard it, but this probably qualifies as the worst nerd joke ever: "Q: What's the value of a contour integral around Western Europe? A: Zero, because all the Poles are in Eastern Europe."
(tell me if you can find anything in worse taste that won't get this blog blocked.)