I have noticed that the community, on finding a posted answer that appears to promote a product or service, looks up the user's account and spam flags all the other answers for that user that also appear to promote their product or service. Because these answers are now in the flag queue, other community members pile on additional spam flags with a vengeance.
This is an enormous amount of leverage to wield against a user. I'm fine with this if the user is only here to spam his links, but it becomes problematic if the answers being provided are squarely on-topic for the question, and they have been upvoted.
Here is what I'd rather see happen. Flag one of the answers using this description:
While this answer appears to be on-topic, it links to a commercial product, and the user has posted several answers like this elsewhere. It seems as if he's only here to promote his product.
Here is an example of an on-topic post that was spam-flagged. All of this user's other answers also had spam flags on them, but all (except one) answered the OP's question.
Note: Please do not flag this user's posts, just because I showed him to you! I've already removed the spam flags from his answers.
I invite discussion.