You do understand that (set-up dependent) a server is entirely under the control of its admin, don't you? As in, they could literally pull the electric plug out of the socket whenever they wanted. So if you want a stable world, you have two options.
- Set up your own server.
- Find an admin you trust.
If an admin behaves in ways you don't like, don't go back there. Tell people on the forums you don't like the way the admin operates.