LL waterway parcels are preferable for bridging continents. But where chokepoints exist; exceptions to orb security timers should be made.

Creation of new mainland regions cost $$$; which everyone will likely foot the bill for in some manner.

Your conflating of regular explorers by way of vehicle with that of hooligans with intent to disrupt your space is disconcerting. No one is rubbing hands in sadistic glee at the prospect of barreling through your home.

Mainland has no "property rights"; only non-binding agreements with LL for use.

Skyboxes can be navigated over or under. We do this on the regular.

You are presenting a false dichotomy in that the only option is to pass directly through your mainland dwelling.

Very bizarre assumption. If anything, your dwelling presents an impassible obstacle for vehicles.

Aircraft have no set transit routes. Allowing a pilot flying thousands of meters over your property a short grace period to reach the next parcel to their final destination is not an unreasonable ask.

Interesting idea in principal but I can forsee banned intruders equipping their avatar with attachments in an effort to tax the resources on the parcel out of spite.

The main issue for me are the 5-10 second orbs. Mandatory minimum to 30 or 60 seconds would be more reasonable.