Fed up of seeing Acronyms in comments

Why does everyone, when making comments on social media or sites like these always use Acronyms. DH, dear husband, DD, dear daughter, it drives me bonkers. Have people forgotten how to write in a normal fashion, the way comments or stories should be written.

It makes no wonder that children and many adults cannot spell because they are too busy shortening words. Is it because they don't have time to write dear husband, or dear daughter or is it just laziness.