The way to control how people parody you is to occasionally do obviously risible things.
You're such a well-mannered, intelligent, mature debate opponent that the vast majority of your stellar contribution doesn't provide any grist for the comedy mill. If you were occasionally a bit more ridiculous, you might find the parodies more fair.
Or perhaps you might find that's not worth the price. I didn't think that RR's parody of you was very fair - it was very far from the mark. But you're such a worthwhile debate partner, so uniformly admirable in your posting style, that there simply isn't much to make fun of.
For my part, because I'm fairly ridiculous most of the time, I thought RR was spot-on in making fun of me.