Manners... Anyone?

Does anyone else out there feel like no one has any manners anymore?  I can't tell you how many times during the course of a day that a patron sitting on the public Internet terminals instead of politely standing up and walking over to the Ref Desk to ask for assistance will instead raise their arm, snap their fingers, and yell "Hey I need some help over here".  Sometimes I feel compelled to yell back "Take those fingers and shove 'em where the sun don't shine" but according to our director, the Queen Bee, we're just supposed to grin and bear it.