Good point. I don't send out an autoresponder (I can't stand those either) but I usually send an email reply to the comment and I at least visit their blog - if I leave a comment on their blog itself depends on how much time I have and how many kids are crawling on me at the moment lol.I don't respond to comments. I reciprocate comments to others blogs.
when I get people who respond with auto response's its SUPER ANNOYING! and that thanks for stopping by comment...You can keep it. I already got thanks if you came by my blog and left me a comment too. I think traffic for traffic is fair