The things people will say. Sheesh. Kudos to the OP for going back and talking to the manager.
I've gotten WAY more positive comments than negative ones, but the negative ones always take the cake, ykmim? Like from my sister, who also wears her babies, and should know better, said to my sleeping
then 8 week-old, "Why is your mama hiding you in there? We want to see you!" And a guy in front of me in line at the grocery store, "How uncomfortable!" while looking at my totally happy, then six-month-old forward facing in my pouch sling with crossed legs. Siiiiiiiiiigggggghhhh. I just smiled and said, "She LOVES it." Oh, and my mom...
At around four months, told me that I was only going to be able to keep THAT up for another couple of months. Whatever lady, DD is now 12 months, and still loves to be slung.