the reason is best known to adminstrator, but repeatable question is seems as low values comment partially.
maybe, because their is every tendency that someone dislike the post and he or her have to report to moderators of the section to peruse into it, but remember and note, that not all posts that reported to moderator can be locked, moderators take their time to look into a post if it's meaningful or not.

The answer is no, i think acroman08 has answered that question perfectly.

But to avoid locking of your thread or deleting of post, it can be redeemed by increasing your posting quality, i have not seen anything bad or negative by picking correction, for your thread to be Locked, i think you need to change the measure of post making, just research before you could create a thread to avoid blockage of thread.