The may pole is definitely pagan and wiccan in origin. It comes from the Welsh tribal rituals surrounding the rebirth of 'Mother Earth' in Spring time. The village virgins who had that year turned 16 (or whatever age it was consensual to marry in that area/time) would dance around the maypole/phallic symbol in a gradually more and more frantic fashion. It was all a form of seductive dance to entice the village males.
It may no longer have this meaning but just because the people doing it no longer understand what it symbolises does that mean God doesn't mind? I would think it is a grey area in need of a lot of prayer and study. A symbol is a very, very powerful thing even if the people doing it don't realise what it is. And in my experience of witchcraft (I did ten years in the prison of Satanic black magic) it doesn't matter if the person doing the ritual knows what they're doing, it still has the same effect.
It is much the same as if the Egyptians or Iraqis now started 'pretending' to sacrifice humans on bonfires to their gods, just because they weren't really sacrificing any real humans to an idol, and were only burning effigies on a bonfire or something, would that not still make the symbols potent and violent/sexual?
I may be tainted by my past, and have a slightly stunted view of any form of paganism but equally, the symbols of Christmas can be stripped of their significance to the point of being no ritualistic. We don't stand around our tree and sing, or dance around it, it just sits in the corner, no ritualism, no risk.