No one from the Staff gave a conclusive answer on the subject. However, this post caught my attention:
I see 
Anyways, the good news is: They (Moderators) are now responding to "lock thread" requests.
I tried it twice (With the right reasons) and afterwards they locked the reported threads.
In one instance, I PMed the Author right after using the "Report to Moderator" button.
After a few hours the user had sent me a PM saying that "a mod already locked his thread".
You can lock the thread now.
Anyways, the good news is: They (Moderators) are now responding to "lock thread" requests.
I tried it twice (With the right reasons) and afterwards they locked the reported threads.
In one instance, I PMed the Author right after using the "Report to Moderator" button.
After a few hours the user had sent me a PM saying that "a mod already locked his thread".
You can lock the thread now.
P.S: There is no evidence that those posts were locked because of the report.
