Referring to your first point:I would not have thought that George needs Alan's permission to add a new Tennant to his own Apt.Does Alan have some type of contract saying otherwise.
Point 2:Your correct,but is that not the answer to point 1.?
Point 3:"But who cares" I do if Alan or anyone has a medical condition.We are not 100% certain he is on the Autistic spectrum but if he is surely allowances should be made.Excessive masturbation,playing video games a lot,certain types of body movements,facial expressions are all signs.As I have already said I have practical experience of this condition.I could be totally wrong though.JMO