Foo Fighters vs Westboro Baptist Church

We told you that the Westboro Baptist Church was planning to protest the Foo Fighters show over the weekend. Well, they did... and the Foo Fighters got in the last word:

Controversial Glee PSA is ret.. uuuuh, stupid

This Public Service Announcement ran during last night's episode of Glee. It compares saying "retarded" to using the N-word and other racial and sexual slurs. So how do you feel about this? Is the word "retarded" really offensive? Does this PSA go a little too far?