Spoofing can be used to grief other players. Checking for IVs doesn't matter much in the grand scheme of things. It's just points of a stat that doesn't matter in PVP more than an extra tap of the screen.
That said, I do agree that they're against the spirit of the game. I'd even say driving around and playing from your car and using multiple accounts are too. But I'm guilty of those myself.
Are you seriously asking if something is stupid about an economy made up out of hats?