I fear smiler is from the unreconstructed 'anything which causes harm to an animal is bad' wing of the bunny-huggers. S/he probably won't even wipe down kitchen surfaces in case bacteria are killed, while removing slugs and snails from the veg is a definite no-no.
Because that's the trouble with animal rights. Where, logically, does one stop?
Is it OK to harm creatures that don't happen to be mammals? Surely not, otherwise there'd be nothing wrong with battery farming.
What about cold-blooded animals? No, because frogs can clearly feel pain, and it would be wrong to inflict pain on them.
And then it gets tricky.
Snails? Well, they seem to be able to feel pain, as do any number of earthworms. But they do have some sort of nervous structure.
So...Is it OK to cause harm to a creature without a central nervous system? Difficult, because even unicellular organisms appear to be threat-averse and will positively move away from sources of stress.
So, smiler, where do you stop? Do you embrace the bacterium as you embrace the bunny?