The screenshot is confusing, but the selected player is somebody else with stacks, showing that they are in a PvP zone. If you look at the top left, he himself doesn't have the PvP stacks buff.
As I have said, just because YOU believe someone is a bot does not mean they are one.
Someone can actively ignore you while grinding does not mean they a re a bot.
I used to often drop an almandine in my ranged weapon and hit e-1 while at work and not paying full attention to the screen -
I can do this from any position on any map but it is not botting.
You cannot prove a person is a bot so you need to report it by submitting a ticket, after that it is in the hands of HCS to decide upon appropriate action.
You can tell when it's a bot and when it's a person who doesn't want to be bothered. I've seen many of both. Botter patterns are really obvious.