Hello,
The power of the internet is very strong. Most people who are doing research on a product they are considering buying will google that product looking for negative reviews that might sound an alarm, and push them to other products without such alarms.
This is where the Assasin's Guild comes in. The Assasins Guild would be a community of individuals commited to "assasinating" ideas, people, causes, companies, and products online. With the use of reviews, trolling, spamming, and other creative ways, a target's cause can become vitally wounded, possibly even forcing the cause to completely change it's identity, and not relate with the old in any way.
Of course, in order to be a member of the Assasins guild, and have a say in targets at all, you would need to show that you are willing to help in other member's campaigns.
I'd also like to introduce the possiblity of financial insentive. I'm not sure how one would effectively advertise this idea though without drawing too much attention. I'm thinking something along the lines of blackmail though would be effective.
Recruitment and addmission into this guild would have to be by invite only. To keep things kosher. :)
Please let me know what you think!!
Long Live Luna!
P.S. Evil enough for you, shadowcold? :P