OK, no worries.
What I want to say I say it openly and I expect the same from others. If I'm arguing, or flaming, with someone I'll say exactly the same to their face as well as what I put on here, I don't go behind everyone elses backs, and expect the same openness. pm's to me are about not openly divulging specific details, like meeting places, so the loonies can't try to spoil our fun, but if someone wants to snipe or dig at me (or anyone) then I think that's best brought into the open.
As I say, though, no worries and it'll not happen again.