Yeah... um, it's called a joke. You don't need to get offended on behalf of the entire human race.
Yes. But people often use these types of examples to prove their point when nitpicking about other people's punctuation or the lack of it.
They're jokes when someone is using these examples to point out interesting things about English grammar (which is what you and cheesebiscuit were doing).
They're not jokes when someone is using them it to prove that lack of proper punctuation can lead to serious, real-life communication problems.
In other words, if you are whinging, you aren't funny.
BTW, I don't have a phone with a keyboard. I type with a number pad. Spending money on a new phone isn't a priority for me.