what is up with this?

WHY IS IT SOME PEOPLE TYPE LIKE THIS NO MATTER WHAT? I MEAN FOR REAL IT'S LIKE THEY ARE SCREAMING AT YOU OR SOMETHING. AT FIRST I THOUGHT IT WAS LIKE AN OLDER PERSON THING, BUT NOW I AM SEEING YOUNGER ADULTS DOING IT TOO.... ANYONE KNOW WHY THIS IS, OR DO YOU SEE IT HAPPENING TOO?

OH AND WHEN THEY PUT LIKE A THOUSAND EXCLAMATION POINTS AFTER EVERY SENTENCE LIKE THIS!!! IS EVERYTHING YOU SAY REALLY THAT EXCITING!!!?