Anyone that maintains code for others to consume has a basic obligation to do the bare minimum to make sure their reputations are not hijacked by bad actors.

Just sign commits and reviews. It is so easy to stop these attacks that not doing so is like a doctor that refuses to wash their hands between patients.

If you are not going to wash your hands do not be a doctor.

If you are not going to sign your code do not be a FOSS maintainer.

If you're paid then sure. Otherwise... It depends.