Would it be rude to point out a spelling and/or error in punctuation?
I think the "error in punctuation" is the whole point of the humour, and clearly illustrates why getting it right is highly desirable if the writer's meaning is to be understood by the reader. Verbally it shows why enunciation is equally important. IM(NS)HO, "you're" should be pronounced "ewer" not "yore". It does, after all, stand for "you are". (It's been a long time since I last went out on my bike, so I'm just a little crotchety.)