Divx seems almost pointless for someone with a huge DVD collection like you.
I have a lot of TV. Also, if there is a movie I want to watch that I don't want to give money to (namely absolutely terrible, sick shit like What the Bleep Do We Know), I will get it at the internet store. Note that if it's just a bad, easy to find movie, I will buy it. I save theft for the despicable.
Also, things that are difficult to find I will nab (Paths of Glory and The Killing--I would buy them if I saw them in a store, but I can't find em). And of course there's the out of print stuff (or in the case of like Funeral Parade of Roses, never released in any form in the US).
I have my rules, but if I am stuck in a week without money, they go out the window sometimes, but even when that happens, I buy what I steal once I do get the money.