It's just when you emphasize every word, it's harder to read. On the internet, that's known as "screaming". It's a common term and considered bad netiquette but it isn't as negative as it sounds. If you think about it, no one talks in all caps. If you read that post out loud, emphasizing every word, you could probably see how it might come off to others reading it. No offense intended at all by most post either, or negativity sent your way, just clarification.