I made the title of the thread general in case if anyone else has an idea for another and can back it up with good points.
I went to the Grotto again recently and noticed that it's a non-pk zone. Because of this, a bunch of people will just afk right on the farm. It's pretty distracting and unsettling to farm with people standing right on top of it.
For those of you who have a problem with getting pk'd while farming there, it's not to resolve it. Anyone who has 2000 hours is likely to own a house or a guild house. Also, there are other non-pk areas where this number of people don't afk. I believe Zol's pub is one of them. Even if I am wrong on that, the Fan seems to be less populated than the Grotto.