Unless he's under attack, Sebastian doesn't bother with mental shielding beyond a screen to hide damage that would usually turn a psychic's stomach. At least that's the theory. He's had no one in his mind since Voldemort's death.

"I'm sorry, no," he replies with a shake of his head. When he can, he'll donate to charities, but it's become too old a habit to refuse giving gifts to strangers without due cause.