What I find interesting are a few things...
Your son joined WGT about a week after you turned Legend.
At about the 20th of June, you both stopped playing WGT until about the 9th of this month.
This could be explained I guess if you both live in the same household and lost internet, computer died, etc.
But if you both lived in the same household, why would you need to post on his wall about this?
Seems it would be easy enough to just tell him verbally.
Don't you think things like that would be cause for concern?