Suggestions like these are tough to answer. You bring up a valid point, but there are many conflicting opinions regarding the language filter. I'll offer my opinion.
The word you are talking about is very sensitive to some people. In addition, it can be used in highly inappropriate ways, which is especially risky on a family-friendly site catered towards both adults and children.
But then again, the word can also be used as a name, so the situation can get tricky.
(Also, this is a bit off-topic, but there's even a villager by this name, however, though it sounds the same, Dyck is spelt with a y.)
My point is that while some people might have it as their name, the word can also be used in highly inappropriate ways. I do believe people with the name should be able to use their name, however, as this is the Internet, there are some troublemakers who want to use the word in a malicious way. As I've said before, this is a very tricky situation, and it should be discussed thoroughly and seriously so that we can agree on what to do.
Also, recently, a word (queer) with a similar situation was taken out of the word filter. Though it can be used as a slur, like the word you are talking about, it is also a word people use to identify themselves with.
I've given my two cents, I'll leave it up to the staff and other users to share their opinions.
I have to agree with Dilpyckle. People should most definietly be able to use it in their name, but yes, there are people who would use it for other reasons. I personally think it would be more trouble than it's worth. Yes, most people would use it correctly but there are always those few. It would create a lot more tickets, spams (possibly) and could make some users uncomfortable. I'm all for letting people use this in their names, but once again I'm agreeing with Dilpyckle. This needs to be talked out.
I also agree that this would be more trouble than it's worth. After all, people can still call themselves Richard! Although it may not be ideal for those who prefer their shortened name, nothing on the internet can be ideal for everyone.
Filter decisions aren't made to completely ban words, they are to prevent bad usages of those words. As 707 mentioned, you can still bypass the filter to post the name or the book name. Yes, it does create more work for people, but it also helps prevent inappropriate usage
Let's go Gophers! Ski-U-Mah!
Sorry, I don't accept random FCRs.