Guilty of use. It started for me as my husband is very hard of hearing and refuses to use hearing aids. I started using "Soooo" to get his attention before I started a sentence and he could turn down the TV and face me to read lips better. This then has transferred over into my writing on occasion. I shall try to watch it here! lol"So" (As the first word in every sentence. When did this crap start?)
I get irritated when people post things like blogs, riddled with typos that they are too careless to fix before publishing.