Invitations to the social group

I want to thank to all for their invitations to the any social group (Facebook, Twitter, Google+ etc.) from home or abroad. Personaly, I am not interested in it and indeed i haven't a time to sit on computer and "to tweet". Therefore I refuse (or ignore) all such invitations. Even from members of my family.
I am not a member of any social group and I don't plan to accept such invitation in near future.
I believe, you understand it.