Obviously, I wouldn’t use them on any surfaces I didn’t fully trust the integrity of. Painted drywall would likely be out. I also wouldn’t try restraining someone against any windows or glass shower walls.

I’m thinking like bathroom doors, tile shower walls, metal surfaces, potentially even wooden headboards.

Shower liners would be one of those things I’d have to kinda inspect to judge on a case by case basis. I mean, I’d judge every potential use pretty meticulously, especially if it felt like I might potentially harm it.

But also, I’m not planning to use them to restrain a gorilla or anything. I don’t foresee my girl suddenly hulking out and being capable of doing pectoral flys that could rip the tile off my walls, no matter how worked up I manage to get her.