XKCD is, without a doubt, one of the best webcomics around. It’s witty, imaginative, smart, funny and somewhat deep in a lot of ways. Plus it takes a pretty strong stance on a variety of issues and human foibles. This comic is a particular favourite of many on the internet, because it addresses one of those things that is getting drummed into writers all over the internet.
Everyone always warn you to be careful about what you write on the internet, saying that employers potentially will look you up and may or may not offer you jobs based on what you have written.