Isn't carrying a knife forbidden in some countries? Also, I would be worried that it would be used against me and if someone has a gun, they might shoot as soon as they notice I have a weapon, too, no matter which one.
I assume the most dangerous thing about Pokémon Go in this case is that it is a world-wide business now and everything happens at the same time. Plus, as Odion (
>>3) mentioned, the events are planned and happening almost way too quickly to grasp it.
The thing is, what can the Dollars do? We obviously can only help those people we know personally. Otherwise we would probably need something similar to the Dollars Emergency Map. A chance for people to contact someone in their area so they are not leaving the house alone during the night, for example.
I hope things will get better soon...