I've never told anyone that I did until today, for just that reason.
My strategy is just to tell them to bugger off or say, "well, I don't think I like the sound of that so I'll have to pass on killing myself, but thanks for the option...and adios"
...and then distract myself with music or watch a comedy or something positive.
Wherever the voices come from, they have no control over you unless you allow them to.
Is there anyway you could speak to your psych about weaning off the meds, if they are blunting your emotions...as they do? He/she may try to dissuade you, but it is YOUR choice not theirs!
You can learn to manage the voices without drugs...believe me!
Whatever you do though, it would be very bad for you if you just stopped taking them abruptly! I've done that before and my behaviour became VERY aggressive and even violent. Your brain needs to adjust to not having what it is used to having over a period of time...cut it off cold turkey, and it'll flip out...you won't recognise yourself!