Racism in my experience is not WHAT is said but HOW it is said and meant.
I was at a wedding of a black friend of mine and got up to dance with the groom's sister and he immediately turned to me and said
"Oh Padraig you're not going to embaress yourself and dance are you... everyone knows white people can't dance, oh go on then you pasty f4cker give us all a laugh".
Now that series of remarks would, I don't doubt, have been pounced on by some PC tw4t, and even worse if I'd have said somthing about his colour, but the point is that was friendly banter amongst very old and very good friends, so as I said I do firmly believe that racism is not word it's meaning.