In my opinion, it's just about basic time management and respect for people. SSHRC sets a deadline, and the "busy academics" who are volunteering should either be required to meet that deadline, or decline to volunteer. Why should this be different than any other work deadline simply because the positions are unpaid? I get so tired of hearing the "busy academic" excuse. We're all PEOPLE with busy lives in one way or another. Family responsibilities, health issues, financial obligations, etc. But I digress... I'm sure my irritation is being affected by my personal experiences in academia - a context which I obviously can't escape!