[Crystalroborovski]

Honestly in my opinion, free ranging is risky and a playpen is a safer alternative. A bathroom probably wouldn't be the safest option, considering many surfaces are wiped down with chemical cleaners and bleach, and theres probably some nasty stuff on the floor, if you know what I mean. Maybe it would be safe if there wasn't anywhere your hamster could squeeze behind and you had thoroughly cleaned up the room. Of course I don't want to be a "safety freak," free ranging can be fun if done correctly but I personally wouldn't feel safe with a hamster running everywhere.