A lot of the social media personas are made to impress, a proof that fun was had and life was liven, but nobody can really prove those things unless they're also eye witnesses, and people probably wouldn't question the authenticity of someone's social postings unless they do not match the financial or social status of such person.
Say you do want to maintain this "perfect" social image and are just lazy do all the things yourselves, then would it make sense to hire someone to do the things you want to for you and post it on your behalf, or photoshop yourself into every image, and tell you that you totally could have done exactly that?
Is faking a unpractical life style different from faking a practical one?