You technically could make cheese without murdering a cow but you won't find any made that way. Cows only produce milk for their young. To make milk they need to be repeatedly impregnated over and over again. Lifespan of a cow can be 20 years, though they are usually killed after about 5 as their milk output drops. Half of the cows they give birth to will be male and almost all killed as they don't produce milk. Some of the females may be killed too as you'll end up with more cows than you have room for it you keep them all.
As for a human child, drinking human breast milk is considered vegan as long as it was given consensually. If you kidnap someone and tie them up in your basement then it wouldn't be.
Yeah, no need for ID to vote here in Australia. Just rock up at any polling place and give your name and they'll cross your name off.
Don't even need ID to register to vote. Any other person on the electoral roll can vouch for your identity.