Spreading a false gospel is NEVER a good thing.
Now, if they helped feed and clothe the homeless, donate to charities to help the needy, demonstrate love for their neighbors by helping out in community services, etc ... yeah, those are works that show you are a imitating Christ-like behavior.
Going door-to-door to hand out WATCHTOWER and AWAKE magazines to glorify a publishing company with false teachings? No.
Matthew 7:22-23 (New International Version)
Many will say to me on that day, 'Lord, Lord, did we not prophesy in your name, and in your name drive out demons and perform many miracles?'
Then I will tell them plainly, 'I never knew you. Away from me, you evildoers!'
The WTBTS has ALWAYS made prophecies in Jehovah's name - they claim to be prophets and they claim to be the mouthpiece of Jehovah God, and still they hold on to the 1914 prophecy ...