In situations where people exchange ideas and communicate in a "good will" environment your self-imposed restriction would be regarded as a loss to the community/forum. Heck! what's all the fuss about "freedom of speach" when we choose silence eh!:hmm:
On the other hand people rarely change views during "forum duels" and, yes, things may get out of hand easily and turn ugly. Nobody is obliged to put up with such a situation and in this sense I understand your decision. I only want to remind you that your posts are read by more people than actually replying in the threads and they might be agreeing/enjoying them, without you ever knowing (did that sound as a consolation, somehow?
).