Evan,
But a blanket blow-off of the request to protect at least some IGOs is a recipe for a needless showdown. The result of such open hostility will simply validate, and indeed expand, negative public perception of ICANN and plant the seeds for more Ted Cruz-like attack (which will play right into the hands of the multllaterals).
Not sure "there is a proper process for this, and we would really like you to participate in it rather than try to bypass it" qualifies as a blanket blow-off or open hostility.
PS: I am surprised why nobody here has mentioned the "int" TLD, and suggested as a partial solution the use and widespread promotion of it as a natural and trusted home for IGOs. ICANN's support of such a promotional campaign would actually increase its own public trust for it would be seen to recognize and address a real problem of abuse.
Good point. Julf