Your definition of "social" is out of date. Kind of like arguing that phone conversations aren't real conversations, or that when I skyped my son last night there was no communication. Physical proximity does not dictate whether something is social or not.
And as for "EOF", just as irritating as "End of", but with an extra helping of "Aren't I techy!". It doesn't signify the end of debate, just that you're not prepred to engage with anyone else's opinion.