You can't delete all personal information
Take this answer for example. If you were to copy just the text omitting my user ID, your user ID and the dates etc. it's still personal information! A simple Google search will bring you back here and voila - you will have my user ID. Personal information is any information that can be linked to a particular person. So the text of this answer is irrevokably PII of both you and me, just like the text of Harry Potter and the Chamber of Secrets is PII of J. K. Rowling.
So, if you do this where PII is subject to privacy laws, you have to comply with those laws.
Copyright
You don't own the copyright in what you are copying, therefore you need permission or a fair use/dealing defence.
For this answer, you have a licence for personal but not commercial use:
You may download or copy the public Network Content, and other items displayed on the public Network for download or personal use provided that you maintain all copyright and other notices contained in such Public Content.
While the licence requires you to include all copyright information, it does not require you to cite or otherwise acknowledge the author.
Other sites will have other rules.