What is it with mother-in-laws who insist on wearing white to their kid's wedding? Is it rooted in some twisted Oedipal sense of rivalry with the bride, or is it just that some people need to be the center of attention at all times? On the flip side, there seems to be an epidemic of dudes who show up to their own wedding looking like they're about to do a kickflip at the local skate park. But the occasional outfit faux pas is a minor infraction compared to some of the heinous choices people mak…