They jeered Jar Jar Binks. The only acceptable derision officially allowed at an officially sanctioned Lucasfilm event, officially.
TV's Frink said:
Darth Paul?
That whole bottle of whiskey I drank last night was to try and erase from my brain the fact that Darth Maul now has a brother. Even though I'm trying to forget it, he will forever be known as Darth Paul in my mind - well done.