No it may not kill you, but I fear for the person sitting next to you and the ones behind you for the balance of the flight!

I had this same procedure on my UA metal flight yesterday evening, but knew in advance that many UA FAs were now doing it the CO way because they were instructed to last month. Since then, I have always attempted to get a seat in row two, though I seem to always be defaulted on my UDUs to 1B (and I hate bulkhead seats)!

Frankly, I don't like the CO method and far prefer ordering by status though I suppose the problem has arisen with UDU that everybody in F today is either GS or 1K or Plat, so at some point we'll all not get our choice. Those of us in the know will be seated in the first two or three rows to ensure we get our preferred choice.