Now there's a sentence you don't see very often. I guess it must not be TO bad weather wise to keep the cyanide down in it... That'll be fun to try to get rid of if you end deciding to do so.
We had a volunteer "patty pan" squash this year that's been outdoing all the other summer squash. Also a white pumpkin that I SURE as heck never planted (it might be a stray outcross, not sure.. but it's in the melon patch so I'm not sure how it got there). Sometimes the stray volunteers are the best plants, I usually leave a few unless they're really in the road just to see how it goes. Makes for sort of a wild garden.. but hey.. plants is plants.