It's one thing to pick up the points on rooms of people who do not collect the points themselves, but to tell your guests 'by the way, I'm scooping your points' is pretty tastless.

A lot of people travelled a long way to come to my wedding, and spent a lot of money doing it. I was grateful and honoured for that. No way would I insult them by trying to scoop their points.

Whoever pays gets the points. (unless it's my employer of course )