In BB6 after Kaysar returned and was nominated after being screwed against Jennifer in the Torture Cage Hoh, she told him on the way out "It was just a prank dude!"
After Dr. Will told everyone he hated them in BB7, he made sure Boogie knew "It was just prank bro!"
Also, after Dan gave his funeral speech, he whispered to Danielle "It's just a prank bro!" and then again told her the same thing after evicting Shane (She was a fan of pranks apparently).
Last but not least, after returning home after BB16, Christine reportedly told her husband to "Chill bro, it was just a prank."