Again, should you re-read the original post, you would see that a "comprehensive school personality" is another slight the poster makes against the ladies in question, thus not "merely" judging their looks.
I do not judge "comprehensive school" anything to prejudice it's value, but you'll notice the OP associates it with "a decline". It does not require a brain the size of a planet to deduce it was meant in a disparaging manner.
Could it be that whilst you are vociferously defending the OP's choice to be discourteous to mess guests, you have not actually read and digested his post in full? Have another crack.