As I said, my memory is vague on it, but isn't that how it's meant to work? It's apart of the parser which cleans up potential malicious code?
Then again, I might be making shit up right now. All I know is a guy made his instance purposefully not display posts as some gay power play to try and force another software to work how he thinks it should work.
I am also very biased as I used to deal with this shit a lot. If one of my clients broke how their database worked, was informed before hand it would break it, and then asked us to fix it then we would flatly refuse.