or, (choose one):

a) it's just part of my affected online persona; you know, like having a strident, importunate tone of voice in all of one's posts

b) I have a hand condition which makes it hard for me to type, much less use the SHIFT key

c) I'm just a shiftless and lazy guy

d) it's the rule that says normal rules don't apply when you're just goofing around in a non-formal context

e) all of the above

f) a, b, and d only