I think if you have a really nice scarf, it looks good. I love all my Hugo Boss scarves, I don't think I could survive winter without them.
I def. agree with a lot of what people have said. If you wear a scarf, which is something warm, make sure the rest of your clothing doesn't clash - like say, a singlet with a scarf, unless there is some jacketness involved
and jeans...and some awesome brown shoes (aquila has nice ones)... I think that would be a semi-hot look.
Also, guys with short necks shouldn't wear scarves as a fashion accessory - it's just that simple.