It’s not an exploit it’s a tactic. A very effective one that can still be countered.
The reason players just keep shooting and not bothering for the claim is, once at max level, claims are usually more of a liability than anything. Going in for a quick claim is probably the most common way to get put into second wind. The FT DPS is such that a grenade or two while your claiming and not only is the guy you were claiming not out of the fight, but you are.
As far as bunny hop bow spamming goes. Well I don’t particularly feel predatory while doing the leaping legolis but it’s effective. Nobody complains when I do it with a melee weapon but it’s just as effective and called hit and run. It’s just with a ranged weapon you take less damage and tend to have a better win rate.