flash frozen or whatever .. the best thing to do with film is expose it
Hallelujah! That's what I was hitting at: people that just stock film ("just in case it dies") and DON'T use it.
Personally I don't go out of my way just to get a few expired or out of production rolls.
When a film goes out of production, just like the Lucky Colour films in 2012 did, I'll just leave it and change to another that is in production.
The result is that I have still some rolls left over as I moved to Agfaphoto films. They are to be used this Spring. Most of the 20 rolls I had went to strangers in the street as whenever someone asked me about my film camera, I gave a roll for them to try. That is a good use of expired film!
Recently I bought a couple of Ilford FP4 expired in 86 just to get the cassettes as they are re-usable for my fresh bulk films.
Last weekend a good friend of mine gave me a roll of Ilford HP4 expired in 1971 (44 years old). It is now in use in my Nikkormat.
There is nothing wrong if you left some films expiry on purpose, for experiments, cross-processing or whatever.
The bad thing is to have expired film, because you didn't use it as you went "to other lands".
I really hoped that people that don't want to use film (gone digi) could give it away to some kids in the street or educational establishments, instead of trying to make a "quick buck".