[throw101010]

I see pull requests on my projects from new/outside contributors as suggestions, not actual demands.

Refusing a suggestion doesn't prompt for a full explanation, it also doesn't mean it won't ever be reconsidered potentially.

People who engage in open source contributions are usually aware of this, the fact that they generally can fork and use their own "improvement" for themselves is usually enough, and the people who feel entitled to get their code merged in your repository are usually not the kind of regular contributors you want to keep around in my experience.