I know that in Latin America's very social culture, if you run into someone 15 times in a morning, they will casually greet you all 15 times (with either another 'hi', saying your name, addressing you as 'Missus', brief eye contact with expressive eyebrows or mild smile). But in other countries, after you've already greeted someone for the day, if you run into them again in the hallway, etc., they will pretend they don't see you, walk closer to the wall, walk right past you avoiding eye contact by looking straight ahead, at the floor, lifting the paper they're carrying to pretend they're reading... Where do Swedes fall in the spectrum of every-day sociability? Are they comfortable calmly nodding to the same person more than once a day?
How do Swedes react when greeted kiss-on-the-cheek (common in Russia, Mediterranean, etc)? Uncomfortable with a physical boundary crossed? Indifferent but play along with it? Jump to conclusions on steroids (as Americans and their puritanical streak) and think you're attracted to them, trying to lure them into an affair, immediately clarify "they're married"... and more absurd misunderstandings?
They'll probably understand that you're from a different culture, but they are also likely to be quite weirded out by it. There's a Swedish saying: "ta seden dit man kommer", meaning that it's good etiquette to adopt local customs - and it's quite reflective of Swedish culture. I would advice not doing it in Sweden, but it would be perfectly fine if meeting a Swede in e.g. France or Russia. Very few would think you were coming on to them though.