Just getting ready to shut down...but will respond while it is fresh in my mind.
I guess you forgot about all the casinos and the type of security they need for them on the island. The VBG shirt also is a button down shirt, not a T-shirt. The Black T-shirt security guards were at the concert or some beach party. This is a different security company than VBG - I don't know the name of it.
VBG is a security company used in Aruba (sorry the homebase is in NL) and the shirt came from one of their employees. Most likely he/she was a casino security guard hired to watch over the security cameras inside one of the casinos. (trained to watch for casino cheaters - card counters - etc... on the security monitors)
Shutting down now until tomorrow :-)
"I guess you forgot about all the casinos and the type of security they need for them on the island."
Touche'.....I sure did, I was only thinking of the outdoor hotel cams and the refinery.