I've never noticed signs at malls and have OC'ed in every mall I've ever been in for about the past decade. Althogh it seems like no one ever notices, on occassion I have had security personnel make eye contact with me, I nod, they nod back and we all continue on with our lives. My girlfriend brought up the point that people most likely assume that I am a LEO because of my appearance. Perhaps that's why I get away with OC'ing in places where other people have stated that they were asked to cover up or leave. Sometimes I would like to be a fly on the wall and witness some of these negative encounters that people talk about. This is another reason why we should always carry, at the minimum, a voice recorder: for the education of ourselves and others. We can review the events and see what we think we should / could have done differently as well as ask others for their input. I wish more people would do this, especially people who seem to have multiple negative encounters. Ok...Random rant over.