You should encourage these people to "ask locals" that way those who are smart enough to plan ahead will already be there when the mouth-breathers arrive.
Also you should start a website to freely distribute as much silly and inane information as you can. It seems obvious that you have a steady supply of "moronic advice" to draw from and with a bit of rewording you should not be caught stealing their info. Although I am sure the lack of brainpower would hinder most of them from realizing the plagiarism has occurred, you do want to be sure that the freak offspring who mutates a few brain cells doesn't point it out. You should never underestimate the power of stupid people in large groups.
It really is about perspective here: You are bothered by the morons handing out dumb advice to otherwise reasonable people. If they are not morons as well they will check the logic. If they do not, then they really deserve whatever problems crop up. I call it the "Stupid Tax"
And please remember that as dumb as our society is getting all around us, we do not have to join the decline. You have the right to disengage and say "I will not participate in today's activities"
Oh and just for the record I am forced on a near daily basis to ask "WTF is wrong with people?"
So I do feel your pain!!