I want to use "disableHavokOnLoad" on a few of the objects in my mod, but I'm afraid of using scripts since people seem to hate them. However, "dont havok settle" doesnt work when I collide into the objects (I want them to stay static indefinitely). Can I use that script safely?

Absolutely. People who think having a single script will break their game are downright stupid.

It's not the amount of scripts or whatever, it's how they're written/how they run. Default scripts are fine.