Yes, I understand that the operator is responsible for safety, to hold the saw with both hands, to have secure footing, to see what one is doing, to pay attention, to keep the feet out of the way, and to avoid snagging the tip on something or binding the bar. And it is true that I had never heard of chaps or safety gloves before I went on this site and the manufacturer and vendor sites. (I have always used a helmet, face mask, and ear protectors) I have also read the presentation on another thread dealing with foot injuries and injuries in general. I know someone who sawed off his fingers. Chain saws are inherently dangerous, as are all power tools. You can also cut off your arm with a radial arm saw or fall off a roof or a ladder. Use all the safety devices for the tool in question and don't cut corners. I am a city dweller, a teacher and not a professional workman, so I have a healthy respect for these tools although I know they can be and are used safely by many people.
My question about safety had to do particularly with (1) safety features on the saw; (2) engine displacement-- is a larger saw, say over 50 cc, more prone to kickback?; and (3) anti-kickback chain. I do not need or want a fast professional chain at the expense of more possibility of kickback since I am not being paid by the hour and if I don't finish the job today there is always tomorrow.
Thank you and I appreciate your concern very much.