Addition of optional swear filter

Quoted from http://urbantoronto.ca/forum/showthread.php/7113-Urban-Toronto-Rules-Of-Conduct:

No sexist, racist or offensive language of any kind will be allowed.

However, I kept seeing offensive language in some of the posts.

Therefore, I propose the addition of an optional swear filter, which is defaulted to on. If it cannot be implemented, then add a warning that the forums are NSFW. This is because there might be nosy employers/parents/people, as well as the fact that many posts violate the above rule. There are also many minors who read this forum.

Exactly what in that post is offensive and inappopriate for children under the age of 18?

The f-bomb of course.

Update: it has been self-censored. However, a need for an optional swear filter still stands.

Update 2: Read this post and tell me if it appropriate for children under the age of 18: http://urbantoronto.ca/forum/showthread.php/3338-New-TTC-Subway-Cars?p=568561#post568561 (I also reported the thread).