Ask HN: Can Twitter user 'addiction' be measured?

My Boss wants a tool that ranks a list of Twitter users by 'addiction' to Twitter. He doesn't want 'social media addicts' on certain teams. Also to screen clients, partners etc. Think pre-employment drug test. Are there useful metrics or tools for this? Or is it still early days? There seems to be a whole lot of literature/tooling for Marketing depts to identify and classify users but is there something for the HR side? Thanks!