That's fair but isn't it more work to go back and have to rebase your commits to remove something that accidentally got skipped in your .gitignore?

I say this because I am also a firm believer of if it shouldn't be committed it should be in the .gitignore but I've only ever been burned by that when either myself or others weren't using interactive add.

Basically, isn't it easier to fix a .gitignore at commit time than at PR time?