On: Computer Scientists and Google+: Something Interesting is Happening

[philh]

Extensions exist that convert LaTeX to images on-the-fly.

And in a lot of cases (∄ comes to mind) there's just no good ASCIIfication, so inline LaTeX is almost as good as anything else even for people without those extensions.

[nitrogen → philh]

I can definitely see the case for ∄. You could use !E, but at that point you might as well just type out \not\exists or use Unicode.