I'm actually neutral on the whole Pokémon Go fad, but my Pokémon phase was short lived only when they first came out in 1999/2000. I just think Pokémon Go is just basically a heavily modernized version of the anime, trading card game, and the Gameboy Games of the same name from back in the day. I know some friends (online and offline) who are now hooked on Pokémon Go and two them even tried talking me into downloading the app and play it. I just decided not to because I have better things to do (Trainz, art, studying for driver's permit, etc.), but I have no problem with them playing it though. I have no problems with my friends having a simple hobby of collecting and trading Pokémon as long as they're doing it safely in real life.
Not only people will get injured or killed for running into traffic or going into a bad neighborhood, but they could also get their phones stolen. I learned there are jerks out there running around in public places looking to steal the latest iPhone or Samsung Galaxy from someone and trade the stolen phones in for money (e.g. using these drop-in phone machines at a mall). That's why I pay attention to my surroundings when I'm a public place while looking stuff up on my phone. I will feel sorry if I hear one of my friends get their expensive phones stolen or get injured or killed. It's really not Pokémon Go's (Nintendo/Pokémon Company or Niantic's) fault, it's the people using it is.
I am also not in the mood for the competition of collecting Pokémon since there's only one team that keeps winning every time (Team Mystic/blue) because most players choose it and I think it does get boring after awhile. Team Mystic wins, end of story you Team Valor/red and Instinct/yellow losers. I just learned that from videos and I do think that's the most boring part of the game would be besides walking around in areas that don't have Pokémon or have the same Pokemon. I also don't want to spend money on Pokepoints since I'm not passionate about Pokémon collecting or trying to "be the very best like no one ever was". I'd rather spend the money on other things than some in-app purchases for a smartphone app game that I wouldn't really care about and I did however learn that from playing Angry Birds back in 2012 for a short time.
I had some Pokémon trading cards including some from Burger King when they had Pokémon kids meal toys and I got rid of them. Now, I just learned that they can be worth money and that could be a good thing. I never had a Charizard card nor care about getting one, but I do think that's more valuable than catching a virtual Charizard in Pokémon Go. If I suddenly "catch" a Charizard, it would be a card (say it's in good condition and someone forgot about it) and I'd definitely throw it on eBay and make some money for things I truly care about like more payware Trainz content. From learning about Pokémon Go, I also think this fad is just basically a shadow of its former valuable self despite of the popularity it gets.
I'm not sure when this fad will go away since this is like a "rebirth" of the Pokémon franchise, but I do get annoyed by Pokémon stuff on the web now and it's just as annoying as the 2016 election and the ongoing Olympics in Rio which I don't really care about. I just cleanse my mind with metal, drive some Trainz, and that day when this app is no longer popular will come up.