There's a new fad in town, one that Timothy Leary would appreciate, as people go around seeing imaginary creatures and trying to capture them.
At it's core, it's fun, it's harmless, and it gets people some exercise though, like card-flopping, it's not my thing. But whatever... go out and enjoy. Some places are even using it to advertise to get people to go to museums, stores, what have you.
Here's what's going to happen though. People are going to get stupid. Not all of them... Not even a majority... but enough. We've seen it already. Falling off cliffs, trespassing on private property, wandering into traffic, disrespecting cemeteries. I've heard rumors of 'fake' apps that are malware.
There's going to be just enough stupidity by the rude and ignorant that there will be calls for 'something to be done'. Then there are going to be restrictions placed, more and more places banned, and people getting into trouble.
And the fun will go away.