 Although the show featured prominent warning messages at its start, end, and upon return from all commercial breaks urging viewers not to re-create any stunts seen on the program, nor submit footage to the network of those stunts for casting consideration on that or other MTV series, the show was nonetheless blamed for many injuries.In 2001, then-Senator Joe Lieberman urged Viacom to take more responsibility for the program's content; which led MTV to only air the show after 10 p.m.The creators of "Jackass" expressed frustration over the restraints that MTV's producers imposed on stunts after Lieberman's statement.