I put a bull barrel on my 10/22 pretty much as soon as I purchased it. This gun jams ammo all the time. I only use Ruger magazines and have experimented with 4 different ones and all of them give the same results. Should I be doing some adjustment to the barrel or ditch it and find another...
They have the right in their private business to take that stand. It shouldn't upset you....they will just not benefit from the protection of good citizens. I, however, will likely not remember that they don't want me to conceal carry and I doubt it will change my behavior. If they notice me...