I have looked into SVMs but I don't think they would work well in this case because: 1) A separate classifier would have to trained for each user and this would

I have looked into SVMs but I don't think they would work well in this case because: 1) A separate classifier would have to trained for each user and this would take too much resources. 2) I think an SVM would require too many training cases before it becomes useful. If you know different, let me know.