Usually when determining whether someone is a hacker is pretty simple. There are 2 major things you can look for, one being head snapping and or strange movement of the player head. For example, if someone is hitting you and their head is spinning like crazy or if they are looking somewhere completely different, its pretty likely their hacking. Two being if they have strange movements, if they are bouncing around you and moving faster than what would appear normal they are likely hacking. If your unsure, you can just report that person for what you think they are doing. A staff member will likely investigate your report within a day. (I am in no way encouraging players to spam /report and flood staff with useless reports. Use common sense when deciding when to report and when they just might be better than you!) Hope this helps, have a good one!