China is making moves on Taiwan, Vietnam, South Korea, and the Philippians. They are building up their military. Nobody knows what will happen in the future, but there is a reasonably possibility of war in the region which the EU will get involved in. The cold war wasn't all unreasonable fear even if some was.
You don't need to phone home. A radio is something you can hide in a chip, using the board itself as an antenna. Then the chip listens for the signal which can be broadcast many ways (the local embassy, satellite, or spys) Isreal already proved that you can attack pagers in ways like this (their radios were hidden in a battery, but the point remains). The engineering is tricky, but well within something China can do.
There are medications that if not used correctly harm everyone.
Antibiotics cause antibiotic resistant strains, and if you don't take the full dose it gets worse. As such their used needs to be monitored closely.
Some drugs cause mental issues. you shouldn't drive after taking alcohol - also don't drive after taking many pain killers. Again we need to watch this closely since you can harm someone else.
If someone I don't know harms themselves I could say none of my business (this is a debatable moral issue, but at least you can understand that side). However if you harm someone else that is a problem.