I play two Drive Bys / two SoTs in my Leela deck and they do a lot of work against PE. I generally mulligan for them. I try to shoot anything Moosh'd out and run everything else (shooting a Moosh'd w/ SoT Drive By is worth it in my book, three clicks be damned). I see a lot of PE on Jinteki.net and beat them pretty easily with Leela. Generally don't see Mr. Hiro though, so maybe I'll start running into this gross variant and start dying more. Maybe I'm missing something, but Leela / Drive By seems like pretty relevant counter-tech.
After looking at this list I will certainly stop tossing my Plascretes though. Hiro / Punitive / Neural would rattle me pretty hard.
edit: And yes, occasionally I hit a Psychic Field and that is quite unfortunate, but I don't see them all that often (one-of in this deck seems typical).