A question of respect (let the flaming begin...)

[BBROWN1664]

Off-siding seems insane.  I wouldn't ever do it

I am guessing you are either joking or have never tried it. :pokefun

There are certain islands that cut the road in half for a good mile or so,
the North Circular has many of these apparently.  2 bikers "off-sided" to
find themselves on the wrong side of the road with no way back, both killed by a
lorry.

That's not off-siding, that's just illegal.



Off siding is the art of sitting in the right hand gutter on a left hand bend giving you maximum visibility round the bend which in turn allows you to make better progress. Nothing is dangerous about it as it is intended to give you better options for escape in the event something comes the other way as you will see it much earlier.
The off-siding you are referring to is going the wrong way down a one way road in reality. Those islands have keep left arrows on them so ignoring them is like going through a no-entry sign.