[hayleox]

I mostly don't experience this, with one notable exception. My uni's computer science department administrator has a mailing list for my entire class (~80 students). Whenever she sent out an email blast, it would appear to come from her email address, but for god knows what reason, the Reply-To address was set to the mailing list's address.

So basically every time someone had something they needed to discuss with the dept admin after an email blast went out, they would end up sending their response to the entire CS class. No matter how many times it happened, there would always be that one person who hadn't yet learned not to reply to the email blasts.