So then maybe you could give second thought to sending these mails in the first place. For me, they are the first thing I filter to /dev/null when I sign up for social-like service. I have in the ballpark of 300 people in my circles - so I just have to filter the updates like these in order to be able to actually use the mail account :-)

Maybe I am a super-extravert with a ton of similarly hyperactive friends, so take this with a grain of salt :)