Thread:Project:Support desk/Remove "Watch This Page" checkbox/reply

I think it is:

There maybe is a way to actually remove this checkbox during the processing of the page. Maybe with a hook. That way MediaWiki would not even create that checkbox there.

Another option, maybe a simpler one, is to simply hide this checkbox via CSS: Make up a CSS rule, which hides the checkbox and write this rule into the wiki page MediaWiki:Common.css in your wiki!