[artifaxx]

I remember a professor who equated smartphone use with smoking, he told people to go outside with the smokers if they wanted to use their smartphones/Facebook.

[H4CK3RM4N]

I once saw those behaviours described as "idle animations"(on Reddit of all places).

[cableshaft]

I once made a recommendation of "people checking their smart phone" to add as an idle animation for a Facebook game I was working on once. So makes sense to me!