I hope he gets a gazillion dollars and more job offers than he can shake a stick at. Unless there is more to this story than we see here, I have a feeling this will turn out well for the guy.
I just read the other day that the guy who was walking more than 20 miles to work when people pitched in to help is doing well.
Says he needs to get more exercise because he’s not doing all the walking any more.
In Wisconsin, any business that posts no gun signs is legally liable for the protection of everyone there.
If they have no security/checking to ensure no one is entering armed, however, you can ignore their sign, as they are not taking their liability seriously and not doing the minimal to keep people safe in their business.