If you gained access to the Battlefield 3 Alpha trial be sure you read over the NDA and follow the instructions carefully, noncompliance will lead to some serious repercussions. Though a mass amount of footage has leaked from the alpha trial, EA and Dice are going to take extreme measures against all those that do so.
Dice’s Daniel Matros shared on Twitter what will happen to a user that breaks the agreement of the NDA and shares footage from the early alpha trial of Battlefield 3. When asked what the situation is regarding posting footage from the trial, Matros simply stated:
Post footage and you’re immediately banned :)
His comment is quite blunt and very clear. If you thought about posting footage from the trial, take this warning into consideration before making a reckless mistake.