Here are two posts from our Review pane:
The former is TL0 and the latter is TL1. Is the reason for the DELETE USER button on the former simply because they are TL0? Is there any way for that button to be suppressed so we don’t accidentally delete a legit user?
There are two thresholds that prevent user deletion in the site settings:
delete user max post age
You can’t delete a user if they have a post older than this number of days… default is 60
delete all posts max
If a user has more than this number of posts, you can’t delete them… default is 15
It can be hidden by adding this CSS to your theme
.reviewable-item.reviewable-queued-post .delete-user {
display: none;
}