@ntnsndr unless there is a global question to be decided on, you don't need global-scale play democracy, only local-scale. Aren't there good models for that in local governments or small states like #Sweden ?
Personally, I believe there is nothing global except capitalism and nuclear war. Everything else is a local issue with non-local impacts. Doing something locally can have positive results. Doing something from outside will involve capitalism or nuclear war, likely with negative intent.