Sometimes when I go on a short 1 hour flight, I usually just like to watch the take-off, have a drink and read the in-flight catalogue (just out of interest) and watch the landing.
In some airlines, for example Ryanair, you have to ask for the in-flight catalogue.
Is it impolite to do so if I have no intention of purchasing an item?
Do these flights usually have quite a few catalogues, as I don’t want to deprive the people who want to buy?