I do the same thing; I really only respond to the ones that I feel I can contribute. I think it is up to us to spend as much or as little time on that as we like : )

Hi
I am sure there are many of us who felt or maybe still feel as though we are using up too much of our time reading emails and blogs rather than working on our website etc.
I have now disabled some of the options and will go through the activity area as and when I have the time and read what I feel will be interesting from there. I do spend time answering a few questions from there when I feel I have the knowledge.
If you would like to change the emails you receive, click on your profile (image) at the top right hand side of the screen, then go to Account settings and scroll down. Right under Email Notification settings you can Un-click the emails you wish to stop receiving. You can always go back at a later date if you wish to start receiving some of the emails again.
I hope this helps.
Victoria

No obligation whatsoever to do that. Just screen and go, what captures your interest and delete the ones that you don't. Alternatively, if you don't want to receive email there's an option in your profile settings.