yep, i've taken my road bike on a ryanair flight and it was fine
I have got a hard case though, I got it from http://www.bikeboxalan.co.uk/ which I would definitely recommend – it is a dead good case
Some people advocate having minimal wrapping, so that it "is obviously a bike" – I personally wouldn't recommend this, as I don't think it's the fact that baggage handlers might throw it that is the problem, but the fact that stuff might get put/fall on top of it. The bikeboxalan one has got a pole in the middle for crush protection.
NOt that i'm challenging anybody, but I think something that bulky that's 20kg is a bit too bulky and heavy to throw very far with ease.
Also when I went on that bus from the long stay car park to the terminal the driver said bikes weren't allowed on it. But since mine was in a box and "didn't have chain and wheels visible" it was ok as just a piece of luggage, as long as i made sure i held it still.
Also been on easy jet as well
It always has to go IN at the 'oversize luggage' check in area, but the only thing to watch is where it comes OUT – it's never obvious – sometimes it comes out on the normal conveyor belt