<ul><li>generic-looking 'English' name that's ever so slightly wrong: in this case, the lack of capitalisation on the surname</li><li>a mismatch between nationality, language and/or location: in this case, if he's supposedly an American, why does he apparently only speak French?</li><li>a profile pic borrowed from the internet</li><li>content in doubtful English that has nothing to with language learning and which contains a link </li></ul>