Educational? Hardly. CFL bulbs had been around for years before this man mentioned them, so if anyone didn't already know about them, then they were being willfully ignorant.

But they wasn't what really stuck in this particular activist's side. Nope. "You forgot to mention what happens if you have Muggle neighbors and they notice that your trees are suddenly two times taller than normal....." Totally forgot the 'don't use this around Muggles' warning, dude, so anyone trying was on you. And there were people that were dumb enough to do it too. "Also, trees do have feelings, you know. So, that spell hurts them just as much as it would hurt if someone used it on you." Duh.