Please take a look at the following sentences:
Arggg...That's Who He is? A Des-News writer? He's so annoying
(Ignoring the fact that the words "who" and "he" shouldn't've been capitalized,) every sentence needs to have some form of punctuation at the end. The rule is that if it doesn't end with an exclamation point or a question mark, it must end with a period. Yes, MormonDiscussions.com participants, even the last sentence within a post must end with end punctuation; when in doubt, use a period.
Therefore, the above-quoted sentence should've been written:
Arggg...That's who he is? A Deseret News writer? He's so annoying.
Now go thou and ALWAYS put some sort of punctuation at the end of all of your sentences. Yes, even the sentences that are the last ones of your posts. Use a period of you're unsure.