[faithhopecharity]

I do not carry a firearm, but always try to avoid shopping at any stores that request customers not to carry...

as a matter of principle

(and personal safety)

[BereanBrain]

it’s concealed. Their “request” if not formed in a legal manner holds the same weight as an opinion.

[Tupelo]

I do carry a firearm (legally w/CCW) and I do not carry a gun into any establishment that has a sign telling/asking me not to. Of course, I also do not go inside and spend any money in any establishment that tells/asks me not to carry a firearm in their business.
After all, in the end it is their business and their decision.