I've noticed that too - sprawks seem to have little or no fear of humans. They absolutely will not be deterred from their goal.
Had one once, clinging with outspread wings to next door's now long gone leylandii hedge, peering inside to try to spot lunch. I yelled, rattled scary stick mk. I - no reaction. Eventually I touched the bird with a twig and then finally it flew off, with very bad grace. 'Onestly, the language