maybe it's the groups that I run in, but I know several people among my friends (with an admittedly small sample size since I don't often accompany them on shopping trips) who specifically avoid antibacterial soap, myself included.

You're a founder of a California 501(c)(3) nonprofit science research organization. I think it's safe to say it's the groups you run in. By contrast, my parents and family in the Midwest have no clue about it. Antibacterial means cleaner, right?

Friends agreed with the science poster. Mom yelled at me and left the house alongside my sister to buy new soap.

Scientists are not my primary social group.

You don't have to be a scientist in order to be well informed about matters that are very important to you.

It's the groups you run in.