Yeah the women wear bonnets. The men have beards, wear plain shirts and pants (didn't check for zippers or buttons or fasteners or anything) with suspenders. I noticed that the suspenders had a little plastic piece on the back where the two shoulder straps are joined and that they boots some of them were wearing were definitely not hand-made. Also, some had glasses that looked to be mass produced but that's a bit harder to tell.
And they were awkward both with and without the women and when it was just the women. I don't know, it wasn't quite rude but it almost was. You definitely get the feeling that they'd rather not be talking to you even when you're just trying to politely do your job.
So the Mennonites can drive cars and own manufactured goods? Oh and they were buying doritos today when I ran into them, though I don't think that's taboo for them.