Yes. Unintentionally, mostly.
For example, I told a scouser the batman/scouser joke and a one armed man the one armed fisherman joke.

edit: I frequently take the piss out of my hard of hearing mates.
( CowJam, Tue 24 Jul 2007, 16:21, archived)

What?
Speak up.
( Dr Preference AjcuiVd289, Tue 24 Jul 2007, 16:25, archived)