There was a news item in the UK last week about a man in Chideock, Dorset who staged a protest about the volume of heavy traffic that has to come through the village where he lives.
A pedestrian crossing has recently been installed on the road, using traffic-light control. So one morning he decided to cross the road, and then come back again, non-stop, for an hour. Each time he got across the road he pressed the crossing control button to come back. A few vehicles got through on the green light each time, but after just one hour he had caused a four mile tailback of traffic.
Let this be a lesson to Oracle DBAs and developers – even a small job, if repeated very frequently, can create havoc with your system.