It looks like you can glitch Pokémon Go gyms using eggs

[Administrator]

Pokémon Go players have found a way to permanently win a gym for themselves - by placing an egg in the location instead of a Pokémon.
Numerous gyms in the New York area have been claimed by people using the exploit, Reddit users report.
A gym with an egg placed in it instead of a Pokémon cannot be fought or won back.
Read more…


More...