I was thinking we should brainstorm this. There are undoubtedly some very smart people here. No wrong answers, just brainstorm.
How can you stop the randomised spam. The text is random, the image is random and the link is random right down to the host.
Obviously a standard filter couldn't cut it, but what about a random filter, or even a smart filter.
Let's say we block posting all links not on a white list. We could also block posts using words not found in a dictionary. Naturally not being able to post without subject text solves the image problem.
In addition, I have tried following the spam links, mentioned in previous thread, but they don't lead anywhere. I cannot understand the motivation for these posts. If it was ad money then just filtering the links should solve it, but it doesn't seem to lead to ad sites or somewhere requiring registration. I get the impression the spam is generated by someone with the motivation purely of attack. In that case, why don't we see more spam, is our current filtering that good?