User blog comment:ScyXorZ/Terraria Builder/@comment-4408735-20110915230543/@comment-34181134-20110916191628

It will count more as Personal Hacking. It won't ruin the game for people so its not bad. You can't spawn items if you use mods in your Single Player though because you can't chat. So make sure your server is you only if you don't want people to know your hacking.