Whenever I use any of the LVM tools which require a response to a y/n question, the question is asked, but the default ('n') is auto-answered and there is no opportunity given to answer 'y' and complete the process... The only way that I've been able to do it successfully is by adding --force.
This behavior was observed in both the installation environment as well as a fully installed system.
root@caprica ~ # lvremove /dev/vgSpinners/test Do you really want to remove active logical volume vgSpinners/test? [y/n]: [n] Logical volume vgSpinners/test not removed. root@caprica ~ # }