"If you witness a group of issues, some relevant and some irrelevant, you will feel a need to respond to the relevant issues.
If you witness someone responding to the relevant issues of the group, you will think they are responding to the group of issues.
The exploit, taken from this, is then clear: Group up a bunch of issues (Apples, Oranges, Watermelons, Rat Poison) and then people who show concern about the Rat Poison will seem to be showing concern on Apples and Oranges. And people who are supporting Apples and Oranges could easily be mistaken for supporters of Rat Poison."
And yeah it started off in the worst way possible, so 'giant mess' is an improvement but not very good.
https://www.reddit.com/r/KotakuInAction/comments/2jb6q5/boyc...
Contains: a promotional poster of "boycott of the day", a pastebin full of "sample letters to use", a list of email addresses and twitter names to contact and talkint points when attempting to make Blizzard stop advertising at Kotaku, a site which is apparently "anti-gamer-gate".