Unfortunately, even after learning what the "rules" are for commas, some people find using them tricky. There are cases where you should not use a comma that on first look resemble places where commas are recommended.
There are other places where commas are optional, depending on the style of the writer.
I've an upcoming article on these cases to show what I mean.
And, as I said at the beginning of this article, many people who write online have dispensed with comma use altogether, possibly because they are writing quickly and can't be bothered to go over their work with the eye of an editor.
Because punctuation is a convention that has been agreed upon and carefully taught as a way to ensure our communication is clear, however, I think we should at least try to be more careful how we use it.
I'm sure you'll agree with me when I say that miscommunication has often been the culprit for family feuds and even wars. On a more mundane level, I know I have at times purchased something that I thought was supposed to be one thing and found out later that I'd misunderstood what I'd read on the label.
Kids can be funny at how they misinterpret what they think they hear the adults say.
Older people (like Mr. Magoo) can get funny ideas when they mishear conversations, too.
These examples can be funny, but they can also sometimes be tragic. As writers, we are responsible for the words we use and how we get our messages across. Punctuation is one way we can be sure that what people read is indeed what we were trying to convey. That's why people started to use agreed upon punctuation in the first place.
Maybe the world is changing so fast that the language is changing with it, and we will one day no longer share these rules of punctuation. I hope, however, that the goal of clear communication is not swept away with the discarded rules.