i feel its ok. it came with the game. people who glitch do not use any cheat codes or add on peripherals. if the testers did not catch them, it should be considered a "secret" part of the game.
Glitching sucks. On Crossroads, glitching can make a game impossible to play. You get inside those walls and you see the whole map. It has ruined the game and so has rank up. My rank went from 50 000 to 70 000 in 3 days. I hardly played in that time.