Considering this was a scam text and the person what trying to steel money I think this is fair game. If the authorities are listening then they could block the number and it may interfere with other scams.

Because wee chat is a free from any surveillance?/s

Sounds like the cool version of china.

The UK is metrifing. But it takes time to make these shifts. Most hospitals will ask for weight in kg but usually have a calculator available. Charts and information leaflets have kg. Lift weight limits are in kg (usually then represend by people) Baby’s weight is given in grams but usually the next question is what’s that in old money. So the systems are all in kg but mentally we are in stones.