Perhaps a compromise would be to give the user the option to send emails to a hard-to-guess email address and then, if the user comes across the situation where he needs to delete a spoofed post, make a note near the deletion link that the option is available

This way, grandpa talking about his dog doesn't need to bother learning about security he doesn't really care about and the power user can post securely if it so happens that someone decides to spam his blog