@hisham_hm But you're not "J. Robert Oppenheimer" cool :P

But I guess it highly depends on local culture, to me it has a certain pretentiousness in Germany, because in the end we only have an upper bound of 100m people (including Austria and Switzerland) with German-sounding names, so name collisions for famous people are not that common. Can't even think of one example where I'd say the full name when talking about them. Also technically the grammatical definition might be slightly different.

@tef There should be default background color or something which would define "this user is just ranting by default". :P

I do think it's mostly a problem of people with lots of followers though, for whatever arbitrary amount is "lots".