Marc:  unless you called someone a name, said something really derogatory about them or went on their blog and trolled, I really don't think you have anything to apologize for. 

Things can get a bit heated around here sometimes, but nobody really holds too much of a grudge. 

I'd have been kicked out a LOOONG time ago.

It would be a sparsely inhabited cyber communtiy if articles like yours "upset" people.  I thought it was good.

Trolling is when someone goes to your blog and puts comments that have nothing to do with your blog.