My concern is less the vultures - though that's a concern - but I know my family pretty well. Winning a multi-million dollar lottery WOULD create resentment with some, of that I have no doubt. But that creates a different concern: if you "give", it's almost worse than if you give nothing, becuase it's the same problem that we see in the P/R threads. $10 million for ME is a massive amount, and life-changing. But I can't give $10 million to 20 people. Even if I gave half of my prize away, it's around $200,000 (round numbers) to 25 people,with (possibly) another tax burden... I can absolutely see someone saying "You fuck; you won $10 MILLION, and all you gave me was $200k? Cheap bastard." That to me is worse than a charity hounding me.
The Chinese (of which I am one) have a way around that. Ever see those little red envelopes that get passed out at Chinese New Year or weddings or maybe birthdays?
The rules are pretty simple. If you ever make a big "score" (the lottery certainly qualifies), you share the good fortune. You put some of it into the Hong Bao (the little red envelopes) and pass them out. Family and friends. If you ever receive one, be grateful. Period. Do not even think of complaining about the amount, you ungrateful ass, just take it and go away now.
We got one in the mail one time from my uncle with $100 inside. He'd hit a minor jackpot in Vegas for like $100,000, so he was being a good Chinaman and sharing the good fortune. Cool, a hundred bucks. We went out to dinner or something. You don't compare what he'd won with how much he gave you, that's not just bad form, it's literally forbidden. Complain about it, and you'll be run over by a herd of stampeding yaks, or possibly worse.