The fallback license seems to depend on the community, in my experience. People in the Linux development area do seem to default to MIT, because it is GPL compatible. (But then they often dual license under GPL and MIT, which is...weird.) In corporate world, the default license for releases is usually Apache 2.0, because it has patent terms.
For further actions, you may consider blocking this person and/or reporting abuse
A community for COSS builders, founders, consumers, investors, and fans.
The fallback license seems to depend on the community, in my experience. People in the Linux development area do seem to default to MIT, because it is GPL compatible. (But then they often dual license under GPL and MIT, which is...weird.) In corporate world, the default license for releases is usually Apache 2.0, because it has patent terms.