Just a simple question, just as the title states. I just want to know if there's any harm that could come from other people knowing your MAC address?
Just about the only thing I can think of, is if that person happened to be trying to access the network you're on, and that network filters access by MAC addresses.
The reason I ask is because often times videos and screenshots on the internet blur them out, and I have a video on Youtube that exposes several MAC addresses.
MAC addreses identify (in theory) a NIC uniquely (worldwide)... so these provide among other things the ability to recognize a computer even when it is using dynamic IP address...
As it is a best practice to minimize any exposure of data my recommendation would be the other way around: Is it absolutely necessary to expose this piece of data in this specific case ?
From what you describe I don't see any benefit but potential harm... so: don't expose any MAC unlesse absolutely necessary.