Not sure this is a genuine annoyance or not but here goes, having to acknowledge a driver for stopping for you when you use a zebra crossing.  It is now the done thing to thank the driver for not mowing you down.  On the flipside, when I'm driving and pedestrians thank me, I acknowledge them as it's polite.
There's a notorious zebra crossing in Leamington by the Adelaide Road Bridge/bowling green.  I wait to cross there and the amount of drivers who don't stop is breath-taking.  I always V them or put my thumb up.