My Laetacara dorsigera were effing evil.
Really? The ones I have and have kept were very mellow. I have 4 now 2 males and 2 females in a planted tank with Ram, Angels, Ottos, Dwarf Loaches and Glo-Lite tetras and they never bother any of the other fish. They only ever interact with each other. That's interesting, how many did you have and what was the ratio of males to females?