Holy crap, this is totally like Golden-Age Superman. He used to taunt crooks like that for years before he gradually evolved into Mr. Nice Guy. Heh. Re the party scene, I can imagine him talking like an old-time, cigar chomping Hollywood mobster: "Shay, nishe faberge egg ya got there, Falk. Be a shame if anyt'ing happened to it, shee?"
I suppose this isn't totally OOC for post-1940s Supes when you consider that Perry White is near and dear to him, so his son getting kidnapped would plausibly trigger a "mama grizzly" response. (The crooks should just be thankful they didn't touch Lana. (As in Whatever Happened to the Man of Tomorrow?: "YOU HURT LANA?!" Still gives me chills, that.)