When a server has a banned item on it, you will be kicked and temporarily barred from the server after getting a kill with that item. For a banned warframe, this only applies when getting a kill using their abilities. This mechanism is to prevent abuse of severely broken weapons / frames that impair gameplay for everyone else.
The following shows banned weapons / frames across various servers.
Each server may have their own specific banned items.
If a server is not listed here, then it does not have any banned items.
