I removed Ubuntu Builder using Synaptic with option Mark for Complete Removal. I thought that gonna delete folder (made by Ubuntu Builder) in home dir, but it's not. AFAIK Mark for Complete Removal is same as Purging, and that should delete all files made by program. Am I wrong? Is it safe to delete it with sudo rm -r /home/ubuntu-builder because it is in home dir? And last question. Why is it made folder in /home instead in ~/ dir?