Poison Ivy and Gotham City
I like to think of Poison Ivy of as a Terranitarian instead of a Humanitarian. Humanitarians focus on humans while Terranitarians focus on Terra (Earth).
The first step in being sane is to admit that you are insane.
Poison Ivy hasn't been written with any kind of consistency. She's been very nature-oriented ever since she turned green, but her attitude towards other people has been variable. I suppose that can be explained as part of her insanity.
Personally, I prefer the version of Poison Ivy that wasn't green, wasn't insane, and didn't care much about nature beyond an advanced gardening hobby. She turned into a plant girl cliche, whose ony redeeming quality is that she still has blood filled with a variety of toxins.
No city deserves to be terrorized, and Posion Ivy doing something nice does not forgive her previous felonies.
That someone attempted to murder her without due process is another matter entirely.
Infinity
Sam Varden 50 MA/Reg Scrap
Doomtastic 50 SS/Inv Brute
Ceus 50 Eng/Kin Corr
Cinderstorm 50 Fire/Fire Blaster
Does Gotham City deserved to be terrorized by Poison Ivy after NML?
I think it does.
During No Man's Land Poison Ivy took over the park and left everyone else alone, shelters 16 orphaned children and when the fresh food was running out she became Gotham's only source first through enslavement by Clayface and then in an understanding with Batman to peacefully do what she could for everyone.
Skip ahead 1 year later and New Gotham is built and the Mayor threatens (and apparently does) uses a plant killing agent threatening to do it while the kids and Ivy were still inside and not one person Protested. Of the thousands perhaps millions of lives she saved in that city, not one person came to her defense in protest.
The fact that she sheltered the children and even built houses for them as shown in the issue and the fact that she took in the children and protected them, even from her self and eventually even came out of the park due to not wanting those children to die, no to save her self shows just how much of a humanitarian she is... and really shows that there is a solution that she would be happy with that would be helpful to the world, but is never given that opportunity.
Granted, she had also killed, but the more one thinks about it she was either not in her right mind and/or looking out for the ecosystem of Gotham rather than just the people.