True, but....many airlines use age as the delineator for assigning SN. A 2 year seat lock is nothing to a mid 20 something. Further, when it comes to furlough, we work from the bottom up. So that SN, just one number, could mean all the difference. I never agreed with assignment of SN by SSN. It should and always should have remained by age. Oldest first. Always. That mandatory retirement age and all that....we're not FA s after all.