Samsung know that developers are the key to apps and so they go to help promote them by getting questions asked on Stack Overflow. They didn't specify exactly what the questions should be, they didn't say that they had to link to a particular site.
I often hear devs bemoan the fact that the OS/hardware combo they love isn't used by anyone and how despite the fact that it's THE best platform/hardware combo around today they just don't have the apps on it they want.
The way apps to get built on hardware is that manufacturers support and nurture a developer community. So a company comes along and uses some pretty intelligent ways to go direct to the developer community (help increase the documentation around the system) and they're lynch-mobbed for it.
Granted, the questions were naive (about a competition rather than technical) but there's no need to hang the poor guy or publish his email for it. He's a marketer and doesn't realise SO isn't for idle chat. Instead of lambasting him as the mortal enemy of devs why not just write back to him and point out that SO is the wrong place to promote a competition?