I don't see how this would help in anyway. Yeah, it sucks that someone when someone pulls before you can even get there, but it's not against the ToS.

I don't think SE designed hunts with the intention of having the entire Data Center being there to kill them. It's already difficult enough trying to get into a zone as it is whenever an S-rank or world boss is up, or a hunt train going on. I'm not looking forward to when they cut the instance servers back down to 1. Giving people 7 minute will not allow you get there any easier when an instance is already at maximum capacity. They could give the S-rank a 30 minute invulnerability and you'll still be stuck in the wrong instance the entire time and miss out.

Honestly, they should just make it so you can only get credit for defeating hunts if you're from that world. That would cut down on congestion and stop the issue people missing out because someone pulled while they were frantically clicking on the aetherite trying to switch instances.