On www.single.am you have the possibility to block the receipt of messages. Go to "My Bildkontakte" - "My settings".
So members can reply to you, but are no longer able to post messages when clicking on your profile.
Furtheron you can put members on ignore.
Go to a mail of the member and click on the button "ignore" below his profile.
On your ignore list you can view whom you have put on it ("My Bildkontakte" - "Blocked user"). You can remove them anytime.