In the event of a massive die off, I would be content being part of it, but offing myself would have little to no impact on the condition of the earth, it would be another statistic and isolated event. I had a discussion last night, clearly the original thought is full of holes and it would never work, it also wasn't an idea to balance the ration of rich to poor either, people are driven to survive and will do whatever it takes to do so. And economically those that have the most means of "defense" are the wealthy. And medicine is humanity's strongest defense in the event of a plague.
In the mind of many scientists, or "alarmists" as they are often labelled, the scale of ecological collapse has already been tipped too far. And the only viable option is to jump ship. The most likely option is to colonize mars and pollute it's atmosphere into being able to sustain life. If it's one thing we are outstanding at. And if we are able to create bio domes sustaining us then we can indefinitely pollute the atmosphere, as Mars lost it's atmospherical composition over the course of hundreds of millions of year.