Had an awesome Idea for anti botting Randomly throughout the day, random sections of the world become pvp enabled zones. Everyone in the zone at time of activation is given a warning and a tele option
But the warning and tele option are captchas or randomised in some other way to ensure bots wont be able to recognise them. Then as someone spends time in a pvp enabled zone, the level gap also grows
So over time if 1 person spends ages in the pvp zone (like bots do) everyone will be able to attack them. Attacking and killing them should come with an incentive (gp/xp/points) for unique kills
Leaving the area however should not lower the gap because sometimes bots do move around (for banking and such) so the time spent just adds up until the area switches to a different area