What causes the 2012 Honda CBR250R crotch rocket motorcycles to fall over when parked?

What causes the 2012 Honda CBR250R crotch rocket motorcycles to fall over when parked? - 1

Gravity

Fall to the left - the asphalt road surface softens in hot weather and the side stand sinks in.
http://www.ebay.com/...kstand-pad

Fall to the right - park with the bike leaning over to the left when on the stand.

Poor parking, kickstand not fully extended.
Poor parking spot, soft surface.

Some git in the parking lot giving it a shove. (Happened to a friend of mine.)
A car or truck backed into it. (Happened to me with almost every motorcycle I ever had -- heck, my landlord backed into my Nighthawk once)
What they said about soft surface. (Happened to me once.)