Bird scare tape, will it scare off birds from near by nest?

I'm possibly over convinced by the power of the bird-scare tape I've bought in an attempt to protect my crops. It's the silver and red tape that blows in the wind. Before I install it, there is a bird box about 3 meters away from my soft fruit (planning error, perhaps) and I don't want to risk upsetting the nesting blue tits. Will they be bothered?