The one I saw the sign in was pretty roomy, I have to say. You could probably squeeze 10 people in, if they’re really thin. No more than that, though. That 11th person might be mighty unhappy about where he’d have to stand.
I had a lawnmower that had a warning not to pick it up and use as a hedge trimmer.
My favorite is the bag of potato chips advertising a sweepstakes: No purchase neccesary, details inside. ( just heard about it not viewed it so it may be urban legend)
I always like posting about the sticker (similar to this one) I saw on a Bobcat at a construction site. It shows an unwary bystander getting chewed up in the wheels and bucket, next to large letters warning “DANGER: Avoid Death”.