I'm of the opinion that porn probably is harmful to most people, and especially to minors, but I haven't done any research. If someone asked me to defend that position, I'd have to admit I couldn't. If someone said we should institute new restrictions on porn due to its harms, I would expect them to explain the harm they allege, and show that it is real.
Meanwhile, I'm generally satisfied with the age-based restrictions we currently have. I also think porn falls under free speech, and therefore the more tight the restrictions being proposed, the more carefully we should proceed, and the more thoroughly we should examine the justification for them.
Poem wants to ban porn, but refuses to demonstrate any kind of risk that would justify this. So that's an absolute non-starter for me.