Does size matter in the garden?

The trigger for this was the fruit bushes - in particular the redcurrants and jostaberries. Every time I walk past them a flock of blackbirds fly out and I doubt that I'll be able to pick any of these because they'll all be pinched. I've tried netting the patch in years past, but, invariably, a bird would get caught in the netting, or they'd walk under it as the ground is too uneven to peg the netting down.
This started me thinking of moving a couple of plants to a small area where I could keep them secure-ish because any crop would be better than nothing.