Let me first start by saying Im OBSESSED with this game, it is sadly addicting. That being said, it is hugely overrun by cheaters. "Spoofing" is a cheating epidemic that allows players to manipulate their phone GPS so they can place themselves into gyms and catch rare Pokémon virtually anywhere in the world. One team color dominates the entire Pokeworld (starts with the letter B). If youre on the yellow team, forget about ever getting gym coins, instead, Niantic will be happy to charge you real money for fake coins :)
Zeemango about Pokémon GO, v1.31.0