I've been resisting this since the word first came up -- but I can't hold it in any longer: every time I glance at grease infractions, I see, just for a split second, yeast infections! Maybe I need to eat some yogurt...I don't know, I'm not a doctor and I never wanted to be one when I grew up (which apparently hasn't happened yet).
I'm not sure how things are going NOW, but I went on a country-wide tour with a Veggie Oil, biodiseal-converted bus (yay! Free fuel!) in 2005, and restaurants to find grease were EVERYWHERE, in great numbers. We could virtually pull up to any mall. I'm really surprised people would *steal* it, because literally every place we went to the business was thrilled to give it to us, as they normally have to pay to have it disposed of. It was a win-win situation. Japanese places were the best choice, because the grease they threw away was the cleanest. My guess, however, is that this article is WAY more relevant in California than most other places in the country.
"(G)rease theft is a crime of opportunity. (Thieves) include do-it-yourself environmentalists worried about their carbon footprints, warring waste management firms trying to beat each other on the sly, and petty thieves who are profiting from the oil’s rising value on the black market." -- "As Oil Prices Soar, Restaurant Grease Thefts Rise," NYT Online, 5/30/08