Although this didn't mention the blinking Other Users box, I decided to post code to solve that problem (for those who find it annoying).

#Other_Users { visibility:hidden; } /*this will make it a gray bar
or */
#Other_Users { display:none } /*this will just not show it
or */
#Other_Users { text-decoration:none; } /*this will display it normally
+*/
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To turn off the other April Fool's jokes (which I liked but have gotten old) switching your timezone to April 2nd works best