I must have a weird sense of humor because it sure doesn't click with alot of folks!
I think a lot of us don't come across in writing the way we really mean to sound. That is the hardest thing about communicating via the internet.
That's one reason why you should let people know your joking.
How?
Well you can use something like this at the end of your comment.
[sarcasm]
or
[grin]
or anything else along those lines.