Interesting ideas. Sort of reminds me of some of the WTS methods. Actually, they're pretty tame compared to the Watchtower's goal in 2006 of globally distributing a tract called "The End of False Religion is Near." This tract identified problems with other religions with the goal of encouraging people to leave their religions. Didn't have much impact but you've got to give them an 'A' for effort.
And the letter-writing reminds me of when the WTS encouraged Witnesses to engage in massive letter-writing campaigns in the 70s and 80s to governmental leaders in countries that banned the Watchtower religion.
And all of this is pretty tame to the Watchtower practices in the 20s, 30s, and 40s of picketing in front of churches on Sundays with signs denouncing religion as "a snare and a racket." How is that any different from "apostates" picketing in front of JW meetings and conventions. I think they're all a bunch of kooks...but that's just me.