They aren't defying the law.
...and are you sure that's USAA's internal headline?
Would you prefer “stretching the law?” The child development center is a day care, not a school. The day care facility is in a separate building from the office and not associated with the 6 story concrete deck parking lot. I think implying the property is a school facility is quite a stretch. Have you read the Florida Statutes on concealed permits and the “Preservation and Protection of the Right to Keep and Bear Arms in Motor Vehicles Act of 2008?”
I stand corrected on misunderstanding: The Headline Is My Own Thoughts
The Correspondence Headline is: Tampa: Prohibition against firearms on USAA property remains in effect