abusing stumble upon
Tim never fails to start interesting discussions on the GeekySpeaky message boards, and this one is no exception. It centers on exchanging stumble and digg requests, and asks, are we marketing, or gaming a system?
My answer is on the thread linked above, but I’d like to add to it - only stumble the best of what you write or blog. You shouldn’t be stumbling every post. You shouldn’t be stumbling every other post. Once a week, at most! How do you know when you’re stumbling the right kinds of articles? When you see traffic increase, lots of reviews on the article, and increase comments on that entry - you’ve done it correctly.

I’ve definitely been seeing a huge increase in bad stumbleupon sites
Some of the articles that I see that people ask to be stumbled are just awful. I cringe when I read them. They could definitely use this post as a guide.