Wow, that was an enjoyable, educational article!
Yes, the tropics are great for guerilla gardening, just throw your organic trash with some seeds on the land and Eden will appear.
I also like sirsak(Bahasa Indonesia) or guyabano(Filippino), a bit messy to eat but great taste.
When I was a kid, I used to grow my own lettuce in our garden. When harvest time came, it was always bigger and more beautiful than the one my father had planted and cared for and everybody was always wondering why.
Nowadays, with all the research that has been done, I think it must have been the love and the pride I put in my gardening, because plants are also sentient beings.