1) It's their game.
2) I still don't see how this is different from someone getting banned from any other game they paid for.
How about this scenario:
I go and buy an MA-rated game when I'm under age, for $100 (typical Australian example from 1995).
I write a letter to a gaming magazine about it and get published in their next issue (disclosing my age in the process)
Publisher finds out, comes into my house and takes it from me.
That's basically what has happened here. A customer has paid money for the game, disclosed their age in a public forum (which by all accounts is probably not their real age) and been banned from playing a game they paid money for. The game, being online only, is now essentially worthless to them.
Instead of being unreasonable, bioware should have done one of two things:
1. Taken it as the joke it is or;
2. Taken steps to verify the player's age
Instead, they simply stole it from him. No questions, no investigation, no appeal process, no refunds.
If they didn't steal the game, they at the very least stole his money.
Bioware = thieves.