What is funny is different for everyone .. ba
If someone gets offended at your humor .. it's just that they don't understand how it's funny as it might have hit a nerve and created the opposite effect.
As long as your humor isn't purposefully insulting to someone ... I wouldn't worry about it.
I like the "Most Offensive Jokes" I find on another site.
aye, as if i like clubbing seals... no sense of humour?.. ;|