If your neighborhood listserv is full of stuff like pic-related, consider doing the following:

>Join the list.

>Lurk. Do NOT engage, except to post mundane stuff about gardening, etc.

>Save info for situational awareness, as appropriate.

>Wait for Election Day; you will be rewarded with a massive salt mine of misery. (this one was pretty rich in 2016)

>Monitor the list in case any actual threats are issued; inform the proper authorities.