Just a thought on sport bikes, many in this area will just raise the leg instead of the hands due to the configuration of the bike. At first I thought it was a gesture of something else and had a talk with a young man when I caught up with him in a rest stop.
But, he assured me it was in good faith and the reason. I've found out now that was the reason that many call them "squids" because of the rising of the leg. Sort like a squid when they swim..... I've heard of stranger stuff, but I guess it's all good.
Ugly John