[SMCARA] PSK-31 Signal

[Allen Landmann]

I thought people might like to know what a bad signal looks like on the air. So here are a few pics of a guy in Ohio cluttering up the air waves at night on 40M, I was unable to reach him but another helpful ham was able to render assistance.
 I'm curious what caused this, was it transmitter overload or a ground loop problem, the ham that helped him said that it could be the bands? It seems to me that no matter what the conditions are, a radio should not radiate harmonics by itself like that. 
The first screen shot is of a PSK-63 signal, the second is a PSK-31 both from the same guy. The red arrows show where the harmonics are. Any help in relation to why this would happen would be appreciated. Maybe we should have a test-your-radio-on-the-air night or activity and do our part to keep our bands free of bad signals.

Allen,
KB3WEY