I agree, my friend. It's THEIR business. They can make their own rules. The downside for them is that they basically rolled out a white, vinyl, window welcome mat for any criminal looking to operate within a stress-free work environment. If "law-abiders" obey that silly sign and enter anyway...they do it to their own peril.
BTW...hilarious picture of you driving there and then backing up. 100% upvote and followed ya. Peace.
I wish I could claim that meme was my creation, it is a good one for sure :)