The mempool filters do not seem to amount to much this time. Solving the problem at the consensus level may be preferred from the security standpoint of lightning network users. A nice fork would be good for the price in the long run as lower transaction fees would allow entry of new participants. A fork would also scare and wash out many computer-illiterate statists. A little purge is what me need. Be it soft or hard, but preferably hard. If the spammers want to gamble, let them gamble big time when the fork comes.