At one stage, DH worked for a line manager and his line manager who were (to put it politely) absolute wankers.
They both had school age children. When the company holiday calendar was published they would both 'bag' virtually the entire school holiday period. They implemented a policy that no more than one member of the team could be off at any one time. As they both had six weeks' leave per year, that meant (between them) twelve weeks' school holiday time gone.
DH got the dregs. As he was lowest in the pecking order, he had to ask them for time off. His holiday requests were never granted.
He found another job. Whilst it is most unchristian of me, I was smugly satisfied when the company went into administration and both of them ended up receiving government statutory redundancy payments.
Luckily, we didn't have school age children at the time. However, as a teacher this 'policy' meant that DH and I really struggled to get a holiday together.
There are lots of people who work in organisations where they cannot be guaranteed leave that corresponds with school holidays. Stupid rules like seniority and 'numbers of staff off' mean that some parents can't necessarily get school holiday time off - despite their best intentions.
Presumably, based on some of the opinions on here, they shouldn't be allowed a family holiday?