Disagree. This is obviously a deliberate design choice with obvious implications. Expecting a bounty for reporting this is unreasonable. These kind of beg bounties are exactly what gives security "researchers" a bad name.
The security implications are also minor. The only problem really is with making a fork of a private repo public - that should only make what exists in that fork public and not any other objects. Something that was already public staying public even when you delete it from your repo is not a security issue at all. Keys you have ever been pushed to a public repo should be revoked no matter what, with or without this GitGub feature.
The security implications are also minor. The only problem really is with making a fork of a private repo public - that should only make what exists in that fork public and not any other objects. Something that was already public staying public even when you delete it from your repo is not a security issue at all. Keys you have ever been pushed to a public repo should be revoked no matter what, with or without this GitGub feature.