No, they are not. There's plenty written on both sides of the argument, though.
Just today came across a surprisingly well-referenced article on nutrition myths. It covers cholesterol, saturated fat and eggs (in top position) among others.
http://www.businessinsider.com/the-11-most-destructive-nutri...
Here is another well-referenced source
Good question. The author of Living Low Carb[1] argues that it's not "saturated fat" in general that's bad for you, but rather more specifically "trans-saturated fat", or saturated fat consumed along with simple carbs (sugar, etc). He also argues that most dietary cholesterol passes through your system unprocessed, and that serum cholesterol is largely driven by cholesterol manufactured by your liver.
[1]: http://www.amazon.com/Living-Low-Carb-Controlled-Carbohydrat...
It's bizarre that people have been convinced this stuff is deadly poison.
Same thing for sodium chloride
But considering the saturated fat and cholesterol in eggs, they have been considered harmful. Are they?