You know, the minute I saw his jacket I was wondering if something would be said.

Just some random thoughts on what was said above:
There's a difference between wearing memorablia of a branch of military or police/ fire department versus wearing a service jacket that contains a rank insignia. Wearing a dress uniform with rank insignia while not a member of said branch would be consider fraud. It's generally not enforced unless a poser is making claims about fraudulent service and using that uniform to advance his/ her self being.
A singer on stage wearing a uniform will get some ribbing and mutters under the breath of the die hards but there are bigger fish in the sea to catch. I think Mig was going for the British invasion look of the sixties where this type of kitschy look was popular. And heck, he looked good in it which was the only shining moment of his night (IMO).
Mig doesn't owe anyone an apology. Had his uniform top been used as a tribute or something purposely connected to the Marines, then yes, there might have been a storm brewing. But I think it should just be chalked up as a fun wardrobe to enhance his song selection...even if he did sound more like David Cassidy than Mick Jagger
