I agree. most of my long hours are self imposed. Often time it's fun to finish things, or take longer to do something in the best way possible (vs rush through during normal hours), and have a certain number of accomplishments in a year.

However I understand that other people may feel pressure to do the same even thought they value family life more. Some employers probably don't do a great job in encouraging the family life and set out goals that require extra hours to complete (over 40 hr work week), which is what such a regulation may aim to alleviate. In practice I think it will cause more harm by dabbling in company culture.