For every action there is a equal and opposite reaction; Anet made the move speed of the Grenches that kill presents to fast and as a result people looked for ways to circumvent that.
Trying to farm those presents for CCShards in Kamadan this year I sure saw a lot of those types of shenanigans going on:
I saw some players in virtually vacated dists using some kind of speed hacks it was like they were skating or sliding around at high speed instead of running and out running the grinches with ease.
Players were getting the Grinches stuck by the candy canes for easy present turn ins (which I didn't mind). However that never lasted long because some wiseass would pick up a present and go AFK which caused presents not to spawn killing the event for that District.
There were two warriors literally holding international district two hostage for their own personal present farm. They had the grinches stuck and were farming presents and anytime some one else came a long to farm they would hold a present so they would stop spawning and demand they leave the district.
Anet must have caught on to that because I checked back there later that day and District two had been shut down
I did come across one smart guild farming those presents in one of the Asian districts. They had the grinches stuck and had one member at each of the present spawning areas turning them in as fast as they spawn, they must have racked up a boat load.
Anyway, as much as I enjoyed shard farming I think either the grinches need to be slowed down so people don't go out of their way to look for exploits to circumvent it or the event needs to be scraped in Kamadan next year.
C


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