Is this needed?

Yeah, me too. When I hover the arrow to some topics that I didn't started, there's a text "Click and Hold to edit title".
And on the spoiler, that's a guest that posted, but it's no longer allowed for a guest to post here.

 

in that spoiler i believe it's a deleted account but the posts aren't removed. so it just show guests and a name.

 

The click and hold the mouse button to edit the title is a standard IPboards thing, I've seen it on several sites. They could remove the message, but not many people care. Plus, they could potentially ruin the forum, because they are messing around with the board itself. If people did care, there would be a lot more people making topics about this, but given the circumstances I think it's just a little thing that can be overlooked.

 

The click and hold to edit title button only works for moderators and upwards.

A guest account such as that means that someone's account was completely deleted, not just banned.