Ironically, it appear reading comprehension isn't your strong suit.
Yes, devs may have given the OK to guild hopping in the past: I acknowledged that. Just like they gave the OK to collecting multiple guild rewards. Their prior stance doesn't change the fact they are now calling it an exploit. And certain guilds are planning on continuing to use this exploit to raid 6 or more times per week.
If your stance is that guilds and players shouldn't be retroactively punished for doing this, as it wasn't considered an exploit at the time, then that's fine. But it has now been described as an exploit, and those who employ it are, buy definition, exploiters.
By the way, I'm not sure how sound the "everyone can do it, so it's OK" logic is. This would certainly seem to have applied to the Vader exploit, yet those who did go down that path were punished.
