I also have to laugh at Charles' notion that if you use a huge, bolded font, that it makes what you're posting more meaningful.
It just doesn't work that way Charles. You could post your pseudo-scientific notions in a 72-point, triple bolded, underlined, red, italicised font and it wouldn't make an iota of difference to their content.
Although I know one of my 8-year-old grand-nephews does that sort of thing in his "Kindergarten Playtime" kid's forum at school LOL.
On serious, mature forums it's considered bad netiquette, and normally not tolerated by moderators.