Hi, @michaelmoore 
Welcome to our community!
For non-HubSpot forms, you can disable collection of these forms in-app from Settings. But it is not very granular, it’s either on or off. I haven’t tested any workarounds, but you could look at adding (or removing) one of the options mentioned under requirements – adding a hidden field should “break” the collection, for example.
Outside of this, there isn’t a more specific or programmatic way to stop this behaviour.
Best,
Jaycee