Emoji in Hostname - good/bad idea?

OK, I got a family member who’s an Emoji fanatic. She asked me several times to change my PC’s hostname so it includes an emoji like this one :rat:. I know she’s using one on her own Windows PC but I don’t know if that’s a smart idea on Linux.

This sounds doable, but not finding anything on the subject.

I would also suggest posting in a larger forum, maybe someone there has tried this.

It’s not working on my end. I give up. You may close this thread. Thanks.