To return to the woman's apartment was to take an unnecessary risk.
Of course, there was no point in taking unnecessary risks.
Don't take any unnecessary risks, but do what you can.
Too much had happened for him to take unnecessary risks.
"And we don't want to put you into any unnecessary risk."
On the other hand, there was no reason to take unnecessary risks.
He did not want them to come out to face unnecessary risk under fire.
You are not to place your ship at unnecessary risk.
We must not put people at unnecessary risk through our actions.