99.9% of the time, your track won't take you over a waypoint that also lies on the boundary
Ah, there lies the difference which one encounters when going abroad more
Within the UK, people file all kinds of waypoints. Abroad, this gets more difficult, and one tends to use more IFR waypoints (on VFR FPs). Some countries enforce that anyway.
I would say 100% of my waypoints (on VFR flight plans) are/were navaids (VORs/NDBs) or airway intersections. Normally there are loads to choose from. These are usually not shown on VFR charts (the French SIA 1:1M show them) so I used to display them in Navbox.