What would you think of the following solution?
Announce 'I would like to have conversations about the controversial topic Pick-up Artistry. Because talking about it publicly can result in problems, If you want to talk with me about that topic, please send me a message stating your position on the topic.'
By keeping it open like that and not stating your own position, it seems to be about as not prone to mindkill as you could get.
The downside is, private conversations don't have as much bounce effects. For instance in the prior mentioned thread, Viliam_Bur essentially created a post which I don't think would ever get paralleled in a series of private conversations.
(Viliam_Bur's post for reference: http://lesswrong.com/r/discussion/lw/klx/ethics_in_a_feedback_loop_a_parable/b5oz
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.