Rooms from which you have been banned appear in the 'rooms' list

[matrixbot]

Created by @ richvdh:sw1v.org.

They should at least be under 'Historical'. See also #1816

[richvdh]

You can't forget them either (even via the API).

[dbkr]

You can now forget them.

[dbkr]

and for the rest, dup #1282