Chambers Dictionary definition of "Cheat"
"cheat verb (cheated, cheating) 1 to trick, deceive or swindle. 2 (usually cheat someone of or out of something) to deprive them of it by deceit or trickery. 3 intrans to act dishonestly so as to gain an advantage � cheat at cards. 4 to escape (something unpleasant) by luck or skill � cheat death. noun 1 someone who cheats. 2 a dishonest trick. cheater noun.
ETYMOLOGY: 14c: shortened from escheat."
Unless the compiler of a quiz asks entrants to declare they have not used this or any other internet site to obtain answers, how can the entrant be accused of trickery, deceit or dishonesty?