Let us use bitcoin in good way though we can use it anonymously, we do not need to abuse it.
Tell that to those people that use bitcoin for illegal activities and they will only laugh at you. Even if you open up an organization for that, it wouldn't make any difference and everyone will just think you're pathetic. Catching the bad guys is the only way you can stop them.
Depends on your government. I don't think the government will be able to trace you if you know what you're doing. The government will also not pay a cyber army tons of money just to trace you unless you're running a huge drug business.