I wouldn't want anyone to seize the food in your fridge. Unless with "seize" you mean "fill up unprompted" because people know you need to eat and that's enough reason to give you food, and maybe you're busy all the time with constructing bridges or whatnot so they also cook for you.
And while corruption is an issue, it's not the only issue: The very act of having lots of capital to throw around allows companies to direct policy, you e.g. don't need to grease hands to get different municipalities to overbid each other with tax breaks for your new fidget spinner factory. The BS is inherent in the system.
As to scaling: Possibly. Possibly not. I'd argue that it can't yet be envisioned, not even by anarchists themselves (and we're aware of that, hence all the gradualism)... but as you acknowledged that it can work in the small, what happens if all the municipalities we have turn into hippie communes? Would they elect, among themselves, an Emperor Commune to rule over them? I don't think so. They'd find ways to cooperate at eye level. How that will look in detail, as said, I have no idea, it's probably going to involve federation and plenty of subsidiarity.
Practically, right now, it makes no difference as most of us are not living in hippie commune towns. First step would be to get there, then we can think about luxury gay space anarchism.