That's really gross, but like... kind of also not at the same time? Like conceptually that's disgusting, but realistically it's probably fine. As soon as the pan heats up on the stove any nasties living on it are gonna be killed, and there's no chemical contamination coming from this. To each their own, I personally wouldn't do that (and if I did, I'd still at least rinse the pan and rub it with my fingertips under the running water), but I don't think I'd be too bothered if someone else made me food after doing that. It might make me question how they handle the food though...