I will listen to you, especially when we disagree. Barack Obama
To remove the sandbox link add #pt-sandbox { display: none; }
(or li#pt-sandbox {display: none;}
for MonoBook users) to your common.css page.
To prevent the "Your edit was saved" message add .postedit { display: none; }
to your personal CSS.
To prevent site notices add #siteNotice { display:none; }
to your personal CSS.
To prevent the MediaViewer follow these instructions
Use {{Reflist|30em}} instead of {{Reflist|2}}