I really hate it when authors don't do enough research for their stories. Like, they would either get mythological (sometimes historical) facts wrong. Google exists, people. Another thing is when people use weapons that are not Greek or Roman. Why do people feel the need to give their characters katanas (it's always katanas)? Greeks and Romans have diverse weapons to choose from, gladii, xiphos, hoplites, pugios, etc., It's really not hard to do a Google search.
- Jason (SPQRukidding)