A problem is that it addresses CMC as a single construct.
Many argue that the effect of self-disclosure will depend on the type of CMC.
On Facebook, people have a relationship in the outside world as well and people will disclose more.
However, on internet dating sites, disclosure is reduced because both parties anticipate meeting.
This expectation does not exist in video games and chat rooms where people are less inhibited.
Therefore, any theory that sees CMC cannot be valid as there are different ways of communicating online.