In the modpack Dawncraft lies a mod called Creeper Overhaul. It seems there are other various, wooden, creeper versions.

The flags prevent normal creepers from damaging blocks/entities, however any other creeper type is unaffected.

Hi there!
Yes, that’s exactly how it is implemented currently.
I already have a solution planned to cover these kind of issues.
I hope to add support for this soon.
As soon as i am able to work on this, I’ll create an issue and link it here.

Best regards