Go to the nearest Fedex and print out 500 more flyers, literally do things he can't cry about on air but will absolutely damage his psyche. The Mental Trauma inflicted via papering will drive him to be even more unhinged and rage hoggy than usual, manufacturing the literal fear of going outside in his head on the oft chance somebody spots him and follows him home.
That should be the goal and the only goal. As one should feel comfortable in ones home and neighborhood, lets have a little thought excerise this morning, just close your eyes and imagine that you're Ethan Oliver Ralph and imagine having every person in a 3 block radius of your front door know that you groom children and are a convicted sex offender, forget the rest of the shit, those two points and only those two points. Picture of Ralph with Child Groomer above it and Convicted Sex Offender below it on every windshield and stuffed in every mailbox, with the last one taped to the front door accompanied by a ringing doorbell and fast feet.
You can get the picture of how much Ralph would be shitting his pants at the thought of a couple hundred people within walking distance of his door knowing he's a complete fucking degenerate and sex pest and knowing that it only takes one of those couple hundred people within walking distance to do something about it and justify said fear.
This isn't rocket science. This is Life Ruination 101, don't make me tap the sign.