I think many of us have the habit of enchanting maybe 5 or more times in one channel and then switch if all fails to an other, and I'm sure more than one have lost an item because he/she forgot to activate the INS or RINS on the enchant interface, so... mi suggestion is to make thos default activated when there's a risk that the item will be destroyed... it makes no sense that if you have them on your inventory you would just choose not to use them... so... to really chose not to use them u have to unselect them on the enchant or SC interface.
This would have also a big benefit on customer support tickets load since it would decrease the number of tickets sent to you guys.
I hope you guys can do it.