Comment 1 for bug 1458

Updating the GnuPG keys registered in LP would an opportunity for 1) adding new email addresses for the key owner (pending validation), 2) invalidating revoked address and 3) invalidating revoked keys.

TBH, I'm not really convinced it suffice as a rationale for implementing it. Possibly, there might be other cross-checks we can perform, but until now none of them seem compelling.