They will never become large enough to be a real threat, but they can get big enough to siphon a meaningful number of votes away from the Dems like the Libertarians tend to siphon more votes away from the Pubbies.
Plus this same crap was used to keep Alan Keyes out of the public eye.
I support people hosting debates to be as exclusionary as they want to be.
Unless they use the public airways, or a network maintained using easements.
Yes, turnabout is fair play. Leftists have supported Losertarians for many years to drain votes from Republicans. In many cases that tactic allowed the ‘RAT candidate to win.
Careful what you wish for.
The Greens are a true globalist force; and they hold a lot of power in several countries, outside the USA.
While they might not look like much now, that could change overnight. The global Green Party are like dandelions. You can pull them all out of your yard — but, if your neighbour has a patch, they will find their way onto your yard in force. The global MSM, social media and academia all carry their seed, and the rhizome of globalization connects them at a deeper level.
Remember, the USA once had a ‘Democratic-Republican Party’. These things change.