"hey, nice site you have there - it'd be a shame if links to it started appearing all over my spammy network" Good way to clue Google in to this network, and t

"hey, nice site you have there - it'd be a shame if links to it started appearing all over my spammy network" Good way to clue Google in to this network, and then drop it from the index. "Really search engines should just give zero weight rather than negative weight to links from spammy sites" That's what was happening before Penguin/Panda - and it wasn't working. There's no risk to link spamming. Now there is.