When I exited the store with my purchases, I noticed they were in a tiny economy car and that in addition to the three who had come in, there were 3 more in the car! These were big guys in a tiny car in 95 degree heat in Texas! These guys do themselves a disservice by just being strange from the get-go.
Did you get their license number? That sounds strange, especially in this day and time. They should realize that people are going to be suspicious because we don't know them.
Hmm, strange. I watch my local arabs real closely now, too. Be glad when 6/11 comes and goes.