Have skimmed through this topic, reminds me of the Veil days of shilling that was a lot easier to deal with based on reporting shill posts on bitcointalk and why the IP section exists today.
Anyway, I commend the ways Freemind and Jokers have dealt this situation so far, as it's a difficult situation to deal with compared to blatant spammers, especially when there is no "evidence" of shilling but merely a lot of shilling. (
Edit: Based on above post, there is clear evidence of shilling, but still no easy links to follow as it were)
Generally I think tagging as a Shiller and moving on is the correct approach, and then adding to Misbehaving (if shillers group isn't already a moderated group), followed by strikes etc. At least from a look at the shillers group that approach appears to be working, even if it means new accounts get created. This has also been part of the ethos of the forum, allow users to post but tag appropriately, with a ban being the last resort solution. Consider this, it's very unlikely other users would consider the shillers posts to have value if they are labeled as a shill/misbehaving and by default end up with negative karma. These users no longer look like respectable members of the community, and rightfully so. It might seem disruptive, especially if an entire topic is from shillers, but otherwise I think it can be amusing or interesting for others without taking these posts too seriously or becoming a victim somehow, even if not ideal.
My only criticism would be trashing topics that shills appear in as this is completely unnecessary. Posts can be split into a single topic, then the split post moved to IP section. This is how incentivized posting has been dealt with in the past to avoid disruption to forum discussion. Obviously if the topic is started from a shiller then removing the topic is the only option though...
I think it'd otherwise be worth Jokers having access to Shillers group for when needed, seems like this is all on your at present Freemind, which is never a good thing (per SPOF).
When you read some respected members say they don't see the issue with shillers, and other saying they need to be banned, then clearly the current form moderation is the correct decision.
Sometimes sweeping the problem under the carpet with tags is the best way to deal with it in the immediate term
