After doing some research (and searching these forums) I have not read any other reason for "suicide hubs" being dangerous other than if they come loose you can't stop if you don't have any brakes.

So is there any other reason for "suicide hubs" to be named such if a person has front and rear brakes?

I'd like to put a fixed cog on the freewheel side of my flip flop hub. I have brakes and generally prefer to use them for stopping my bike.