Is winning an Oscar like a curse?

WTF happened to Halle Berry, Hilary Swank,Sean Penn, Jamie Foxx, Philip Seymour Hoffman, Daniel Day-Lewis, Jennifer Hudson, Forest Whitaker, Reese Witherspoon. It turned Sandra Bullocks world upside down, Heath Ledger suffered a drug related demise. Ppl who win are either facing some kind of problem or cant do another decent movie lately.