Many of them will be autoers/macros, but there are skillers out there so if you are going to report them. Make sure you check they really are autoers. The best trick is to follow them and ask questions like 'Fishing lvl ______?', 'Hello, are you there _____?' and best of all '_____, If you do not answer me I will report you for macroing!'. Asking them for about a minute then reporting them will usually get rid of the macro.