i joined match.com and have just really been viewing profiles. a few people have sent me emails, some i have replied to, some i haven't as there isn't anything on their profiles that makes me think we'd get on. one man invited me to chat and i declined. he later sent me an email asking if i was ready to chat now or was i 'busy enough already'. i had gone out yesterday and left myself logged on so clearly he thought i was online. but i didn't get the emails til later last night. in the meantime he sent another 2 emails. 1 saying, "I've sent you another email, do you want to chat." and the 2nd saying "you're not an idiot are you?" 
is there an unwritten rule that you have to reply to emails? none of the other people have had a problem that i haven't responded.