omg that drives me crazy too. i want 2 people to work on me...max!
and i do have a serious love for a barber shop close to me. they charge $15 and i tip them $5.
if i dont like a stylist or feel like im getting ripped off - i tip OK and dont go back. if the stylist really made me mad, i complain and tip $1...and of course, don't go back. no love lost for me - you do a good service, i'll be back and tip lots. if you dont? my tipping will be OK and i dont go back. if i cant afford it, i dont get it done.