In our guest bathroom, we have a toilet which is attached to the wall (the kind where the tank is actually in the wall). When we received this toilet it was accompanied by a warning which said there was a 400 lbs. weight limit to prevent it from being ripped out of the wall.
Not that I think it would really be an issue, but we thought it would be funny to let our guests know in the same way that amusement parks put restrictions on age/weight/height. We were going to order a sign, but with my Silhouette, I was able to do it myself.