For what it’s worth the UK uses mph and we’ve had the Internet for a little while now too, and here e-scooters are technically illegal to ride anywhere other than on private land, i.e. not on pavement, on bike lanes or on the road.
The exception is if you’re in one of the cities which is operating a “trial” rental scheme, in which case the rental company will let you know where they think you should ride. But I believe even in those areas privately owned e-scooters remain illegal to use in public.
Body mods that look good in the traditional sense are generally called plastic/cosmetic surgery. Breast implants, face lifts, hair implants, etc. are the same idea as body mods, just with the goal of achieving a more mainstream idea of beauty.