Non lethal munitions/weapons are not so non lethal as people think.

Crowd control or demonstration control is another complex problem that can’t be solved by some magic bullet. It is more psychology game when the police tries to look threatening in place where people can easily overpower them.

I think there are IoT sims that can only receive SMS.

My friend wanted to make something with them (I think smart thermostat) when the internet wasn’t everywhere.