I'm using Seahorse on Ubuntu, and I found that using the 'export secret key' option allows me to save an unencrypted *.asc file containing my GnuPG private key, with neither root access nor the password used to secure the key. I cannot change the picture or other settings for the key without entering that password.
I am very new at this, but it seems to be a security risk. How can I configure my key so it can't be exported at the click of a button?