Just thought I'd add to say that things should be considered from the company's perspective - if you had people making accounts for their dog and imaginary friend to abuse the promotion, you'd look into it just the same.
Going into this, the worst case scenario was not getting the promotion Avios and potentially losing that $300. Others were okay with that if you read earlier posts. You took a gamble and it didn't work out, what's with all the talk about litigation? Sounds like a bunch of salt to me. What's more is that the worst case scenario now is merely getting your money back (and not getting the Avios). Barely something to shout about, apart from losing a few hours of your time making bookings you weren't intending on flying anyway.