I'm seeing lots of "offers" springing up to do negative SEO on your competitors. I know people keep insisting this sort of thing is just a bogeyman, but follow my logic here:
- We know the Penguin update PENALIZED, and not just devalued "over optimization." Read: exact match keyword links.
- We know that if your link profile is too "unnaturally" keyword heavy, (it should be majority your brand or your domain or your company name, etc) you get penalized. Again, not devalued, PENALIZED.
Ok. So what is to stop a blackhatter from using one of those software bots to just kill a competitor? Knowing the above two points, lets say a website is ranking for "cool widgets". Why not just create a bunch of exact match keyword spam links for "cool widgets" targeting that website. In a while, the Penguin penalty kicks in and bammo.
The thing that scares me about the post Penguin landscape is that google has specifically named an activity ("over optimization") that will get you PENALIZED. So, don't do that, right? Except, that means they've explicitly outlined an activity that will be penalized, and is easy for others to do to you, and that you would be powerless to prevent.
I await the usual "this is an age old worry that has never come true" replies. But if you reply that way, ask yourself, can you refute the logic of the points above? And also... oh no... It's happening. I'm seeing it.