Quest Threads are some of the best things every created by /tg/ and are a creation entirely our own.
They allow creative thought to mix with group decision, and lead to entirely new stories, characters, plots, and thoughts for us to enjoy.
I join a few quests here or there, one of my most active ones being Slug Quest. It was a great time, and I loved watching as the quest unfolded, my input having some part of the actions therein.
If you don't like them, you can always hide them and not join. It's not like anyone cares what you have to say, we are having fun.
Another tip, OP, Fuck the Nay Sayers. They just hate to hate, and try to bring down your creation, rather then help improve it.