I've published my project to the site. Since there is no friendly interface to choose btw. individuals (the automatic add spouse and descendants is problematic), everything is online. I want to delete living individuals. How can I do it?
If you've created a family tree in Family Tree Builder and published it to your family site, the changes should be made in FTB and then republished.
If you've created a tree online, click on the person for a list of actions for that person. You should see a button called 'delete this person'.
Hope that answers your question.