The joke is fine, but most of all it makes me appreciate how far xkcd has come since then. It's been awesome for so long, sometimes you forget he ever was a beginner.

A lot harder to do if you use python

Write if(0){ on the back of your left hand and } on the back of your right. Use perspective - or whatever - to put the person between your hands.

This, of course, assumes a person is executable, but as circumstances not limited to but including the French Revolution proved, people are definitely executable.

Curiously, this trick makes the person not be executed, but it also means they can't execute you. Theoretically.

Why is my mind so dirty... Took me a minute to get that this isn't a fingering joke

The gesture for "/*" is very rude.

If you want to comment someone forever, just do this symbol with your hands:

/*

Cursed Technique: Garbage Documentation!