"I meant that the childfree do have to put up with a certain amount of rudeness, hostilitiy and even unfair treatment from breeders (a common grudge point for the childfree is the workplace attitude that the childfree are always available to cover when breeders have childcare issues or parenting duties to fulfill - if you are childfree but have (for instance) an adult dependent who you care for, or like to spend your weekends doing charity work, or even if you do like to spend your weekends Having Fun, it's not all that fair to be told over and over again that your time, your life, your interests and your needs come second to those of people who are parents"
SGB - I think the problem with the "stupid breeders take advantage of the child free and make them do their work" argument is that, unless the child free are planning to live in a shack with no utilities or anything else then they need to accept that those who do chose to have children are performing a necessary function to keep society operating in the future. Otherwise, once this generation hits pensionable age that would be it - no doctors, no police, nobody to work at the electric company, nobody to drive the buses....children are necessary for not only the general survival of the species, but also for the preservation of the conveniences and mod cons which everyone, child free or otherwise enjoy. So I think that it's reasonable that childcare and parenting duties get some priority as it is another form of work (very rewarding work, but still work), and one which the childfree will benefit greatly from as the next generations become the main workers.
It's the same reason you're not allowed to opt out of your taxes going towards schools if you don't have children - the children are being educated so they can benefit society as a whole in the future. Child free people will reap the benefits of there being a next generation without any of the work that goes with raising it, so I don' think that they are particularly hard done by.
Parents taking the piss is a different case, and if they're taking three days of because their PFB has stubbed toe then they're just as bad as the childfree person who calls in sick for three days with a hangover.