The chances of the lane dropping and a trader jumping in a second later are fairly small.
As a pirate you only shoot the lane once an actual trader jumped in anyway, if people are grouped and use the time to jumped through after that then they are abusing game mechanics and you can report them.
In all my years here I've ran into this issue maybe ones or twice?
Claiming that traders are all knowing on this part is funny as well since we all know most of them aren't even tabbed in the game when hauling goods.
Or perhaps, if you're really that bothered by it, you could just find a center of a lane.
