"I'm as mad as hell, and I'm not going to take this anymore," is the rallying cry from Australian actor Peter Finch in his last role as newsreader Howard Beale, in the 1976 film Network.

His character urges viewers to yell the mantra from their windows.

It seems like instead of yelling out the window to clear our frustration and anger, we've been taking it out on other people especially those who we perceive as "less" than us. 

There has been an increase in the number of signs in shops, eateries and health care centres saying rudeness to staff will not be tolerated, what's leading to those attitudes?