Have you ever tried to post a comment on a blog and had it rejected because of "questionable content"?
I have, just now. There was no swearing. The grammar and spelling was even passible.
Edited to add: You can look at the comment I tried to post in one of my other blogs. (Hush!) It's in the entry for April 12 titled "Weblogs, professional development, and the academic food-chain." Xanga, of course, doesn't make it easy to put in a permalink to a specific entry, so you may have to hunt.