Depends on who. Usually, no. Someone I care about, maybe.
Everyone has done that at some point in their life whether they realize it or not.
I don't think so, because, when the truth comes out, it hurts them more than if you'd been truthful
No not ant more
I was lied to, under the guise that it would "protect" me; and it has backfired and hindered me greatly. And I don't appreciate being protected at those costs.
No, because the truth will be discovered eventually. The longer they believe the lie, the more devastated they will be when they finally discover the truth.
lying is just going compound more and more circling problems for the future
No. I wouldn't assume that my reaction or feelings would be the same as theirs.