It only destroys it if you let it in your mind. There will always be cheaters of some sort. I am confused on how some people are near level 30 all ready but it is what it is but I do live near a downtown city. If youre simply trying to catch pokemon it will benefit you greatly and you dont have to pay for it either.
Currently, how people boost to 30 is they save all the pokemon they can, use a lucky egg and evolve them for the max of (30 minutes) the egg. It's genius actually and to the ones that actually do this, captured enough pokemon and candies to evolve 30 minutes worth of pokemon is wild and super affected (hehe). There was a whole article about it posted last week, when someone on reddit shared his findings for level 30 items. Was super cool.
But I defiantly agree about what was posted here, this trading system can literally change this whole game if it's not executed properly and there are any rules implemented. I also hope they ban hackers so this doesn't happen or they make it to where said hackers can't do just that. I now that, if applying for a Pokemon Tournament, they evaluate where you revived your pokemon anyways, so it was hacked and duped you're fuq'd anyways (banned). I guess we will see.