Personally, I'd think it as sad unless they were a personal trainer, tri coach or something where it would be relevant. I understand that people are proud of their accomplishments but damn!
My sentiments.
I'm both, and I still wouldn't consider it. I think it would just be odd, and scream "look at me" a little too much.
Especially since finishing an IM has absolutely nothing to do with being a personal trainer or coach.