Thank you for reaching out to provide your feedback. I'm sorry to hear that you're not a fan of the locking policy, most of the feedback we have received has been overwhelmingly positive. We are working towards a goal of consistently responding to and resolving customer issues in a timely manner. Locking has definitely enabled us to do that more often.
A couple of suggestions - if you have an unresolved thread that is locked, please consider creating a new thread and referring to the original thread in the body. As I mentioned above, later this quarter we will be releasing a feature to make this much easier/more integrated.
Also, I wanted to make sure you were familiar with the ability to tag a user in your posts as I have tagged you above. You can tag someone by typing an @ symbol followed by starting to type their username. You will be presented with a list of users from which to select, assuming they have allowed themselves to be tagged in this manner.
Thanks again for your feedback, have a great weekend,