Agree, it makes it seem like the individual is "one of us" and that what they're saying is a little more raw/genuine.

"They're being mean to me." vs "theyre being mean to me".

I had never noticed this before. Can you point at any examples?

I have long noticed high profile people going to court with some kind of cast on, though.

I heard that altman does it. I don't care about him enough to check though. More silly gimmicks like holmes talking in a mans voice or jobs wearing the same turtle neck

Uh, no, it makes you look careless and unprofessional.

How it's perceived is no doubt in the eye of the beholder. I can totally see how some people would associate this writing style with children, and so associate it with "vulnerable".