When querying a novel to an agent, there's a right way and there's a wrong way.
Right Way: Query Shark (f.k.a Miss Snark, c.k.a. Janet Reid, Literary Agent). Sure, some people miss the mark, but most come good in the end.
Wrong Way: SlushPile Hell. Whatever you do, do not make these kinds of mistakes. To the rest of the world, you will look stupid.