Whilst at Menzies (EDI) last year, I was on the Continental team, so every shift was (at least) an 0600L start...however, I used to also cover o/t on the easy team and often wouldn't finish 'til 2300L....and would be back on 7 hours later.....my choice...and not a word was said !!
Personal choice, maybe.....and I won't say a word about doing 4 doubles (0400-2200) in a row when I was working for bmi !! Never harmed me.