I don't know that they do this anymore, given the number of school shootings, but gun safety classes used to be held at the local high school. Which creates a kind of conundrum: Hunting is a very important recreational/sustenance activity in my area. Gun safety classes were the norm and I absolutely applaud those classes and absolutely understand the utility and convenience of holding these classes in a local high school building outside of classroom hours.
That said, it's another think altogether to be sitting at a school banquet held at the school in the atrium area, surrounded by an open hallway and to see about 15 young boys march along that hallway above your head, carrying rifles as they head to class.
It absolutely used to be very common to see hunting rifles mounted across the back of the cab of a pick up. There was a huge outcry when the school wanted to bring harsh discipline against a kid who brought his rifle to school, secured in the trunk of his car, because he had been hunting before school and didn't have time to get home, secure the rifle and get to class on time. There was no actual threat or fear from this particular student. I'm pretty sure I've seen senior pictures with people posing with their firearms and I know for certain that I recently saw a few family photos with everyone from young kids to parents posing with their guns.
As for posing with $100's--I don't do selfies but from time to time, I have similar cash as in 100's around that I intend to put into cards to give to people for Christmas and birthdays and such. Not something I advertise but here I am: on the internet saying sometimes, I have some cash in my house.