Why do they go so fast...

Don't get me wrong, I have sympathy for anyone confined to a wheelchair for whatever reason.
It's good wheelchair bound folks can get out and integrate with society in electric wheelchairs.
What really annoys me is the inconsiderate driving on the pavements at speeds that must be around twice walking speed i.e. 8-10 miles per hour.
They are almost ranked along with the inconsiderate folks who push around pushchairs the size of supermarket trolleys, generally not looking where they are going.
Both these categories of 'pavement users' only make me 'stand my ground' with even more determination.
Why should we move out of the way for a high speed wheelchair or a aimlessly pushed pushchair?
The fact is we don't have to leap out of the way.
I'm considerate almost to a fault when it comes to pavement manners but I'll not be intimidated.
Apparently the wheelchairs, or some of them can be set to travel at 3-4 miles per hour. It should be the Law!
Pushchairs, child-conveying pantechnicons, whatever they called are often a damn nuisance.
If it doesn't suit me to move out of the way by trying to judge the intended direction of some inconsiderate adult, invariably either shrieking at another child and/or shouting down a mobile phone.
I turn to present a solid barrier and brace myself for the collision. Being old, grey and capable of a withering glare, the resultant impact often results in a stream of well rehearsed comment.
The results are variable but the satisfaction is long lasting.
So, stand your ground against these twin perils of the last sanctuary of the pedestrian...
Now, cyclists.... that is another story.
Cyclist on the pavement are breaking the law.
The cyclist who rode into a lady and killed her, getting off with a £2200 fine, might just have provided the impetus for a legal review.