I'm sure this is not a new thought so please enlighten me on the topic. Wondering whats to stop someone from link spamming a competitor's website in the same niche to drop their SERP in the long run??? I mean if i'm ranked, lets say, 3 for a given keyword. it's probably a lot easier to build garbage links to drop the ranking of the 2 sites above me then it is to build quality links for myself to get ahead. Thanks for the info! just a thought.