1) Chimpersonators 2) Clowns 3) Copiers 4) Copy cats 5) Copy-cats 6) Copycats 7) Copyists 8) Echopractic ones 9) Followers of fashion 10) Imitating sorts 11) Imitative ones 12) Imitative types 13) Imitators 14) Impersonation experts 15) Impersonators 16) Impressionists 17) Little and others 18) Little carvey, and others 
anti-personnel