Earlier today, it was brought to my attention that my work had been used on another animator's demo reel; work that this animator had absolutely nothing to do with.
While I am not particularly concerned, as I am not using these shots for my own reel, I did want to take a moment to address this issue. Animation is a very difficult field, not only animating, but getting into an animation position. When you steal work from someone else, you risk that animator's credibility. If, for example, I were using these shots, and sent them to a potential employer after this animator did, they may not take the time to consider my work, assuming either that I am a liar, or simply that ONE of us is a liar and it's not worth the headache to determine which. In other words, it's this animator's word against mine, and while I hope that the rest of my reel would reflect ownership of those shots, it is not this animator's right to put me in that situation.
The animation community is a family. If you want proof, go to an Animation Mentor barbecue. Animators love each other, and they protect each other. Stealing work from one of us is like stealing work from all of us -- it will come back to bite you, so be very careful what you call your own.