Will a torch coral sting a feather duster?
 

My large feather duster has reached up about an inch since I got it and is gently brushing the torch coral. Any ill effects that I should be concerned about?

Yes, I've thinking about moving the feather but it seems to have dug nicely into the substrate. I will move the torch eventually but I need to get a little more live rock. But if there is no danger having these two touching then I won't disturb them until I get more rock.

Personally I'd move the torch. Even if they're just barely touching, the torch may produce sweeper tentacles during feeding that might do damage to the feather duster.