http://4jndbnscrvmljnl3vynggebzvi5saz5gllk3iksdskgkmoq5oaqtxrqd.onion/pol/thread/39809.html
At this point, I tend to think cryptocurrency's probably the best mitigation (pay-to-post, forfeit-fee-to-miner to prevent UTXO bloat).
I've been playing with something for a few years to do with this, but probably still a year away before I actually create something production-ready.