Unless you've received some poison pen PMs that we obviously won't have seen from person or persons declaring their unhappiness with something you've said Lewis, I wouldn't worry about a thing.
You've seen how easy it is to p!ss some people off on here, with even serious or sensible comments, especially about a range of taboo subjects.
So God forbid that you should try to inject a bit of humour into your posts, - you can imagine how easily that might go pear shaped. I love to be humourous in the things I write, but it is true that without knowing someone personally, or at least being able to see them for the visual clues people give off, you can easily be onto a loser - so I don't bother so much in my posts.
Don't worry about it Lewis. As some great person once said - " You can't please all the people all the time, but with very little effort you can p!ss off some of the people most of the time".
Keep it up buddy - don't let them grind you down.
