1 John is a good book to check out -- here's one example of what it says...
1 John 4:15 (ESV)
Whoever confesses that Jesus is the Son of God, God abides in him, and he in God.
Perhaps it is God's plan for them to reach out to those in dark places though. August Burns Red has talked about how they feel one of their main purposes is reaching out to the bands they play with, which is why they play at secular festivals with secular artists often times :)
well, so far i haven't encountered anything like that -- i usually don't make myself available to hug people i don't know anyways, but yea.. if i felt there was a wrong motive, perhaps then i would deny it :)