Interestingly, as Thierry pointed out, if I run 5 VMs sec-(dapper|hardy|intrepid|jaunty|karmic)-i386, and start them in the order I listed, and do 'virsh destroy sec-intrepid-i386', then only sec-jaunty-i386 gets additionally destroyed. dapper, hardy and karmic all stay up. I tried this several times and the two machines that are destroyed are always the one specified and the one started immediately after it.
Interestingly, as Thierry pointed out, if I run 5 VMs sec-(dapper| hardy|intrepid| jaunty| karmic) -i386, and start them in the order I listed, and do 'virsh destroy sec-intrepid-i386', then only sec-jaunty-i386 gets additionally destroyed. dapper, hardy and karmic all stay up. I tried this several times and the two machines that are destroyed are always the one specified and the one started immediately after it.