I have had people comment on me being a SAHP negatively in real life.
From my first DC being 1yr MiL would grill my about finding a 'little job', regularly. At the time both DH and I were exhausted, I was still breast feeding and coping with a very active toddler and no family nearby to support. DH was working away from time to time as well. DH's wage also was more than enough to support us.
This went on. I have been grilled by other members of the family, although it was no surprise as they have always been quite assertive. They did the same for every position I have taken up since graduating.
Fast forward to when DC started school, was diagnosed with SEN, Statemented and only offered part time schooling. The school were the ones to take advantage, and insist I supplemented the additional support regularly and 'volunteered' for trips, swimming or anything else out of the ordinary. When trying to tail the support off, that I gave the school, parents would then try and twist my arm to 'volunteer' so things weren't cancelled and I didn't work like they did.
You just can't explain sometimes. My DC's needs are not actually difficult to cater for but getting adequate childcare was impossible. Now, in the space of a few years, you would never know that this was the child with Statemented 1 to 1 support. However if I took employment, that just meant the State would have had to pay someone else to do what I did for free. They did it badly too sometimes, because there were always pressures on them to help out elsewhere.
MN allows me to explain a little more, because of the anonymity. In RL I have to be careful to protect the reputation of my DC because SEN is often coupled with low aspirations, which only adds to problems, I expect a bright future.
I'm used to fighting causes though, so can be a little too warrior like sometimes! 