In the course of my career as an engineer, working for a variety of employers, I have collected a variety of business casual shirts (both polo and button down) with the company logo of my employer at the time. While a few of the shirts have gotten dirty or worn beyond what's acceptable in an office environment, most of them are still in good condition and I'd like to wear them to work on occasion. Is that likely to have negative consequences? If so, what should I do with these shirts?
I will add that none of the companies I've worked for are competitors of my current employer, so it's not like I'm working at Ford and wearing a shirt with a GM logo.