I traveled from Krakow to Warsaw to Vilnius by myself on a coach, at night, and survived. Here's the info so you can too.
I wasn't exactly shocked by anything I saw. I guess it's like seeing a celebrity on stage, you're a bit detached because the celebrities or the vaginas are all the way over there on the stage.
So, would I recommend doing the challenge? To murderers and rapists, yes. But I'd rather snog a dog than have to experience any of that again.