the original poster has already deleted their account. as for threads according to this when you delete your account your threads and posts remain.

The following is located in FAQ - Frequently Asked Questions
https://forums.psychcentral.com/faq.php

How can I cancel or delete my account?
When you delete your account on Psych Central, all of your posts will remain but your username will be changed to AnonymousXXXXXX (where XXXXXX equals a random number). This helps to anonymize the information you posted here, which many people appreciate since the Internet has a long memory. We do not allow members to delete or cancel their own accounts, and we do not delete accounts if you have no posts.

In order to delete your account, please send a private message (PM) to Any Administrator (the Administrator responsible for closing accounts; please, not DocJohn). Only this Administrator can cancel accounts, which is done as a batch process once a week (sorry, no exceptions). All of your posts will remain in the community when you cancel your account.

Once your account has been deleted, it cannot be undone or restored. So please consider your request carefully. If you've voluntarily left Psych Central and asked that your account be deleted, you are welcome back anytime (but you'll have to create a brand new account from scratch).

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that said if you want a post or thread deleted and you are not deleting your account you can click on edit your post with in a 4 hour time frame and delete what you wrote and just type in the word deleted . the thread title remains but the content of your post is deleted. if after the 4 hour time frame you will need to contact a moderator who can tell you whether they will be able to delete your thread or post. there is a limit of how many threads you can have deleted so be sure its what you want deleted.