A towelling down

Whenever I watch Wimbledon it always gets on my tits when players signal to a ballboy/girl for them to bring the player their towel, which they then use to wipe the sweat from their face and chuck it back without a please or a thenk you. The ballboy/girl should pluck up the courage to say "If you can't be polite, then get your own fucking towel you sweaty bastard". Apart from the lack of manners, there surely must be some health and safety thing going on here, I mean sweat is a bodily fluid isn't it? Even worse, watching the junior boys doubles final and they were at it as well. The players could only have been a few years older than the ballpeople yet they treated them like bloody servants. Get your act together Wimbledon! We know it's all upper class, Hooray Henries and strawberries and cream but showing some manners costs nothing.