While I can agree with some of your sentiments regarding his behaviors not being beneficial to himself or the game, referring to Earl as a "loser" is not any different than the jackasses that egg him on because they think its entertaining.
You seem to be a reasonably intelligent person, do yourself a favor and read up about mental illness and the stigmas about mental illness. Please stop contributing to those stigmas by propagating words like "loser" when referring to someone that is truly mentally ill.
I will accept you invitation to read up on the subject a little more.