告誡

告 = ⺧ + 口 : Guy Fawkes is informing the golden calf that it is not allowed to eat mandarins any more in the aorta's bathroom by pointing at a big LED screen stating so.

告 = ⺧ + 口 : Mnemonic symbol: one of these LED panels with public announcements which scroll horizontally over the panel.

诫 = 戒 + 讠 : Joan of Arc (ji) set up an advertising column (讠) in the elevator's bathroom (e4) with the ten commandments (诫) about her holy ring (戒) and to warn (诫) everyone to touch it (which is prohibited (诫)).