Sorry to hear that my friend
For those unlucky enough to not have off street parking, can't you chain the bike to a fence, light pole or tree?
I would be even be prepared to anchor a lug on the foot path or road side and use a thick wire rope, large chain or frame using concrete steel reinforcing rod that bolt cutters won't get through.
It seems that if it is not if, but when it is going to happen to any of you, don't leave to chance just do it
Surly some of you are or know a boilermaker/welder that can make or help out, ok you lot who is going to start the ball rolling.
You just never know, might make a life long friend who is rider as well, hell you can't ride with a bike that has been stolen.
I know, easy for me to say, I am and have all the equipment and materials.
Just put yourselves in someone else's shoes for a moment and contemplate what it would feel like to have your bike taken.