So, here I am. Crawling out of my cave to discuss my old workplace again. :lol:
Anyway, let me fill you in on a couple things if OP even still cares. Also could be for future reference.
I do have a few individuals I know that work there. I remember at some point last year when I ran into one of them they told me about an incident with an OCer that resulted in their security manager to allow OC. However do not take this as full on legal advice or anything to the allowance of carry there. After I had heard that OCing was allowed, I actually OCed twice at the mall. I had no incident with security - and they were guards that I did not know from when I worked there (which is about all of them. Most have all moved on). Got a glance from one but they did nothing about it. Did not approach. At the time there were no signs restricting carry.
However this can change on a whim knowing that place. The manager is wishy-washy and flip-flops a lot. The security manager is not very reliable. I know him from a previous employment. He is anti-gun and some of the employees there have told me he is trying to push the mall to put up signs. I also heard he would kick out CCers when he first start, flipped around, allowed it, then allowed OC...so it's highly unreliable as to what ruleset you will stumble into.
The basic rule of thumb is no signs no problem. The mall has been CC friendly, at least when I was there. I personally kept the no guns sign from coming up on two instances where they wanted to put them up. Some other staff members also kept them from going up before I worked there as well from what I have heard. As other posters have said - do not call ahead.
However that being said remember the mall is still private property. They can ask you to leave for just about anything. They could kick you out for wearing pink shoes in theory. The plan of OCing then telling them off and to deal with your lawyer will not go well for you. Their first reaction will be to call the police and the police will always take the side of the business when it comes to trespassing (which is what it becomes when you refuse to leave). If you're asked to leave just do it. Fight the battle behind the scenes with management. Being on the "front lines" will just get you in trouble and damage the cause.
So, as I said. I have done it without problems. But rules are a flavor of the day for that place. Give it a shot and report back and let us know how it went. If it was warmer, I'd do it myself. But it's a bit cold for me to justify OCing.