More on Tennessee’s guns in restaurants bill
Most of the restrictions we bear on the rights we enjoy follow this model. Slander, libel, incitement to violence, etc. are all illegal and represent an abuse of a right, but there is no physical mechanism to prevent a person from commiting such an abuse. Similar rules exist for firearms and weapons, and basically fall under the idea that the brandishment or use of a weapon except in defense of self or others is the abuse of the right, and a person found guilty of such an action will suffer the consequences.
Meanwhile, Nashville is looking to use some oddity in the liquor laws to prohibit carrying arms in bars there. The proposed ordinance can be found here.