Yes or no: Some people just need to come to their senses! What if you were working for the enemy and didn't even know it? God says that we should be "with gentleness correcting those who are in opposition, if perhaps God may grant them repentance leading to the knowledge of the truth, and they may come to their senses and escape from the snare of the devil, having been held captive by him to do his will." (2 Tim 2:25-26)
That's a scary thing! How can we make sure that we're not Satan's unwitting POWs? God explains 3 verses before by saying, "flee from youthful lusts and pursue righteousness, faith, love and peace, with those who call on the Lord from a pure heart." Embracing unrighteousness—even just by refusing to fight it—can lead to us being held captive by Satan to do his will.
It's not a struggle with sin if you're not fighting it. Flee it. Fight it. Don't be captured by it. And if you have friends who are captive to Satan, fight for their freedom, but don't let them snare you for Satan. :)