abalastow compendium

For the first several days I was at or near first place on the Google rankings for Abalastow Compendium. I think Google tied me to the other blog.umn.edu entry with us alternating in the role of subpage. For some reason I seem to have dropped from the results completely now. I'm wondering if I wasn't tagged as spam or similar? Which brings up an interesting point. Is negative promotion of other entries allowed? It almost certainly would be easier to create a bunch of obviously spam pages(automation tools prob exist) and link them to competitors than to make legit pages and link them to this. This would seem unethical and effective.