UncleBob is right here, that message makes it clear that retailers are getting smart and sharing return information. It isn't just TRU, but returns you make in several stores that is resulting in flags. Sounds like TRU just implemented it in the mentioned Sept/Oct. timeframe. Stores are becoming more wary of people leveraging return policies across multiple stores, because if someone tends to abuse the policy at one store, they obviously do it elsewhere. Being mad at TRU isn't going to help, because it isn't just them.
What people don't really understand is there is quite a bit of return abuse going on. Stores want people to shop worry free, but they get wary of people that take advantage of things. Slayer, I'm sorry if I am mistaken, but I could have sworn it was you that bought a Series 2 Wrecking Ball and a Series 2 Spyro from a Target a couple years back and returned it after unlocking the heroic - it sticks out because I remember a debate about it. Maybe it wasn't you, but it was a discussion and the person said they had done it before.
Naw not me, i see no point in doing this just to unlock things, i can wait for that. As for heroics ive only done them all on 4 chars as i never had the time to.