in my 7 years of keeping an oscar, the tank is always on the high traffic area. if the fishes used to see a lot of people, they will not disturb anymore unless people keep tapping the glass tank every now and then.
today, my two tank is located at the port whereby passing people used to stop and watch my fishes. whenever i am the one who passed by, they wiggle their tails and beg for foods. Amazinggggggggg. i love it.
but be reminded, what work for me may not work for you. oscars have different characters and mood.