User blog comment:RoyallyBella/Official Season 7 discussion blog/@comment-25830140-20160115233509/@comment-2056915-20160118040423

Well, it is more like a non-spoken rule in Internet, when you type things in all cap, eg: EXAMPLE, it makes people think like you are yelling/screaming/etc. The bold seems to something that makes things have more pressure/noticeable...