The way to improve the S/N ratio of this newsgroup is for people who begin threads, to think long and hard about how their threads can be hijacked by trolls, and never start threads that are vulnerabel to such.
Make a pledge (within your own mind) to only start threads that are substantial, constructive, and not vulnerable to hijacking by trolls.
We would end up with a completely silent mailing list. A competent troll can hijack any thread...