As a habit it is bad, but this is actually standard for short bios. It allows it to be dropped in place directly for conferences, PR shots, news articles, etc without any rewrite.
Great to make it look like someone took the time to do a bio about you because you're important, while it's just you writing. Lack of self-confidence if you ask me.
How do you figure? Every time I've been asked for a bio for a conference or similar, they've asked for it in third person. Reading bios in conference proceeding in first person would just come across as weird to me.
The difference is having a bio on a website about yourself versus a bio on a website about a lot of people. No one thinks that your johndoe.com site was made by your official fan club.
You really named your user account after WHAM!? That's fucking awesome. Tell me you're either George Michael or Andrew Ridgey in deep disguise... please please.
Maybe it looks like that to you because you're unfamiliar with this format? To me it looks like he's written a short bio that's ready for dropping into where it's needed.