Community Manager Josh Nash just recently replied to the pinned topic Using the Priority Pass and Intended Use and stated this:
It is clear that the development team is taking note and specifically targeting any attempts of throwing to earn a small number of Priority Passes. I would consider this a fair and honest warning to all of us to make note of this, and make sure that we all work to try our best in all of our games.
Let’s keep the discussion civil everyone. I have created this separate topic for constructive discussion about this news. If you have suggestions about the Priority Pass system overall, I recommend posting it in the original pinned topic. As a reminder to anyone who was recently actioned and you feel that your silence, suspension, or ban is not justified due to unauthorized access to your account, you can appeal the action with a web ticket to Blizzard Customer Service. For any questions about what constitutes as acceptable behavior in Blizzard games, please refer to the Blizzard In-Game Code of Conduct.