Over the summer I actually made some bacon ice cream, and other than melting quickly it was delicious. It was a vanilla/maple syrup ice cream, and then the bacon was cooked and then kind of candied with brown sugar. But if you got the sundae from a fast food place it's gonna be pretty bad, so I wouldn't hold that against bacon.
But I did try a bacon soda and a bacon lollipop, and they were awful. The soda tasted like hickory smoke, and the lollipop tasted like smokey sugar. So the moral of the story is, adding bacon improves everything, but things that are supposed to taste like bacon don't. Although bacon salt is delicious, and vegan if you're into that sort of thing.