Ю: and if the Mods don’t approve of what you change it to, they will remove it.
That’s only if they notice it. I once wanted to post a link that I knew wouldn’t get past moderation so I made a sock puppet account and simply changed the profile link after the post was approved. It was noticed by other users but the link is still there (from two years ago).
The only times I ever use a sock puppet is if I need to make a post that might reveal personal information about myself or if I want to mess with the mods.