Bad spelling/grammar due to naïveté doesn't bother me, but laziness does.
...You should take the time to capitalize letters, use complete words, write complete sentences, and use ending punctuation. Not doing so displays a severe lack of respect for the message you're presenting.
...You should take the time to capitalize letters, use complete words, write complete sentences, and use ending punctuation. Not doing so displays a severe lack of respect for the message you're presenting.