I totally see your point you're making. One extra reservation somewhere else, that's fine by me!. But I'm scrolling through the cancelled reservations threads and people are literally giving up 6 BOG's ONE WEEK before their trip. Come on, now

That's a bit excessive.
And I think that's a really good point you're making there. It'll be easier to decide where you'll be to eat on each days if you can also make the FP's at the same time. Sometimes, you do have to adjust because there's only one specific day where you can get a hot ticket, and you don't have the hopper option. Something I'd like to suggest as well.
As far as regulating,
MDE can limit it to one per restaurant, per hotel reservation. I'm sure they can have their servers limit some of these extreme hoarders some way or another