You need to understand how a Conservative Court functions. It is not a mirror image of a liberal court.
LLS
Striking down unconstitutional laws is not legislating from the bench.
In any event, this has nothing to do with being CONSERVATIVE - Scalia is considered to be the most conservative member of the court and he legislates from the bench all the time. Time after time, Scalia, Rhenquist and even Thomas all ignored the clear meaning of the constitution in favor of "making the job of government workers easier".
The fact of the matter is that conservative justices have been shown to be just as likely to render their judgments based on their own world view just as much as liberal ones have.
The terms conservative and liberal are just vague labels and labels that have actually completely switched places over time. The term conservative now describes two distinct voting blocks - Christian socialists and "classic liberals" which believe in small government, property rights, civil liberties, free markets and constitutional limitations of government.
Unfortunately, Scalia, Thomas, Roberts and Alito fall into the category of christian socialists.