The problem is... the government then can use that as a reason to claim that they can regulate the hiring practices and other aspects of the Home Depot company. "Anyone receiving government funds must comply...". Sound loopy? Tell me you don't know that some leftist judge wouldn't just love to expand the government reach that way.
Sounds to me like if the government puts in writing that the sales would not cause Home Depot to fall under the auspices of those laws and orders, that they would be more than happy to do business with out servicemen.
I am with Home Depot on this.