I still get to many secret keys when I ask someone for their OpenPGP Certificate.
I've thought about what to do here. And I think it would be better to call the option differently. Not "Export Secret Key" but "Backup Secret Key" to make it clear that its not an export that should be given to someone. And it also makes it more clear if someone gets the instruction "export your key with kleopatra"...
Improving the "New Certificate Dialog" which is something on the agenda might also help.
since 3.1.13 / 3.1.12 the filename contains _SECRET_ and the user is asked for the passphrase explicitly when exporting. So I doubt that another dialog with a warning would help much.