Admittedly haven't explored this myself, but I would expect some insert in my shoes to significantly alter my gait. When I received orthopedic soles, these changed my whole stance and gait. Heck, if there's some twist in my socks, my stance and gait are changed as well. Curious to learn more how well gait recognition algorithms can remove these effects from their prediction.

> how to control your stance or manner

Quite "easy". Put a pebble in your shoe, or some scotch tape on your skin. You'll behave differently

> Someone (human) trained to differentiate authors of handwritten text can often still do so even if an author is actively trying to write differently.

That was never proven. Please cite a (good) source or I'll take it to be false

> Please cite a source.

I can't, though I think you could argue about it deductively.

> That was never proven.

I guess you can't provide a source either :)

> Put a pebble in your shoe, or some scotch tape on your skin.

If someone you know well did that, would you be able to differentiate his limp from someone else's? I am sure you could. I think it's intuitive that our "limp" betrays features of our normal behaviour.

Time to bring up this educational video: https://youtu.be/JASUsVY5YJ8?t=280

a wheelchair seems like an easy bypass, albeit one with very specific use.

I can see all subversives having wheelchairs in not-so-distant future.

Heelys! Never underestimate the power of fads and fashion

Crutches, gait-modifying shoes, roller-skates

There are lots of options