Mistake is inevitable, if there is no mistake there is no correction, that is, people make mistake and through the mistake, corrections are made. Most users submit their post without cross checking the write up. So in many times omissions occurred and some ungrammatical statement occurred and English speaking users see them as trash, shit post without correction. It is better you reread you work before posting to avoid mistake. Be a good poster. Avoid mistake. But mistake is inevitable. It most come but not always.