Due to the bad weather

A letter in today's thelondonpaper begins:

I am very discouraged to see signs up everywhere, both official and unofficial, starting with "Due to the bad weather..." This is as ungrammatical as "Ten items or less", as seen in supermarkets. It doesn't take much to get it right. We seem to be dumbing-down to a woeful degree in this country so as not to make things too difficult for people who can't cope.


I understand the '10 items or less' argument, but what is this letter-writer's problem with 'due to the bad weather'? He doesn't say, and for the life of me I can't work it out.

Can anyone enlighten me?