At times I do, especially when it comes to art. I know for a fact that I've seen some art just recently that has ignited a completely psycho bunny in my head and I can't seem to make it disappear (until I write it, at least, which I will be doing very soon). While some stories can create some sort of plots/bunnies in my head sometimes, I don't usually run with them in fear of unconsciously creating something similar to the story I read.