If communities were standing alone, that idea would work. But communities are hosted and shared on an instance. I find it questionable in that context; it’s a slippery slope.

Should an instance’s users be able to vote on every community they see in their local feed, or should only community members be able to? Instance admins may decide a community does not violates instance rules, while users may feel like it does not fit the spirit or goals or mentality of an instance.

It could work if only community members can vote in their communities. Then you could make community-specific decisions and consequences, and the border of instance and community would be separated by definition.