The Y12 Lang group may recall me saying that traditional conventions for using capital letters are pretty useless, really, and that this is why so much online communication dispenses with them.
Sometimes having everything in lower case can be a bit of a problem though. You might want to look at this at home, as the school filtering system blocks most of the sites mentioned. Yes: the website of a Methodist Church near Atlanta, Georgia, is blocked by our pornography filter. D’Oh!