I noticed that while the system blocks you from viewing deleted posts unless you have moderator tools privilege, the system will not block you from flagging them. The only flag available for deleted posts is 'In need of moderator intervention.'
I know this because if I have an already loaded tab of a post that later gets deleted, I can flag the post for moderator attention, but not as any other reason. Or if there is a review task that I reviewed, and the post is deleted, I will still be able to view the deleted post through the review task page but not through the actual post page, and in this case the flag option is available and I can flag for moderator attention.
I would like to be able to flag any deleted post for moderator attention without needing 10K tools. Based on my above observations a client-side script should be enough. Does anyone have a script for this?