They would have to wank on that cable pretty darned hard to bring a bike down. Being more upright the thing should be PLAINLY more viewable / noticeable as well, not some sneaky little carpet crawler looking to trip your toes up. That's a heavy thick ass cable, and when charging NOBODY really should be dicking around with the cables. You never know when you might find a nick or tear in it and it zings you. At 300 Plus volts, once it's running, don't play with the wires, that's just safety there.
On that though.....
WHAT the HELL are you doing poking around MY bike that close, getting tangled up in a charging cord to begin with, and getting entwined THAT MUCH ? for the ass hat who sets your bike over. You want to look at my bike, cool, but you can do so from NOT between the bike and cable assembly.
What the hell are YOU doing getting tangled in your bike cord while charging it, for YOU if you are dumb enough to try to straddle a 4 foot above the ground cord, or don't have the common sense to be UN entangled when setting the stuff up derp!!
These bikes are fairly heavy, the cables are fairly heavy, the kickstand can handle quite a bit of load on it, probably even you sitting on the bike with the stand down as well, (although generally not recommended). For the bike to be in a situation to topple that easily, you need to move that thing to a better place to park it if it's balancing on a razors edge there.
Just sayin'
Aaron