My favorite bug is for metro underground train safety cam. At least the french one on tape released show sqaure when a 'face' is recognised. And it seems that 100% of the front engine of the train get positively indentified as a human face... (might be the headlight stuff with them shield wipers...).
When a technology is so badly flawed to the point of being barely operationnal it's wonderfull to think that companies are still daring to sell it, make money out of it, and idiots rely on it for security purpose...