Add-on Hide signature for a specific post


I'd like to be able to hide my signature in a specific post. I like to have a signature but in some situations I'd like to hide it to save some pixels.

When I'm writing a new post, I can see options below the text field. It could be nice to have "Hide my signature" option there too.

This feature exists in some other forum board systems so why not yet in XenForo, even just as an add-on? :) I tried to google and search these forums but I didn't find anything like this for XF.