Considering the context in which you used the word "prick" it could have been interpreted in its less appropriate meaning (now, isn't this a fine example of self-censoring ).

The post you made, can be seen as offensive, but, since you react quite furious, it's quite obvious this wasn't your intention.

Imho, it's a misunderstanding. The kind of misunderstanding that occurs when people communicate through an internet-forum. The kind of misunderstanding that can escalate to enormous proportions, while in "real life" it wouldn't happen at all.

My prescpription:
Give each other a nice virtual hug , drink a virtual beer and forget the incident.