There is no "point" to be made by my post, rather a description of two vastly different ways I was treated for the same work I was doing during the same point in my life — one online, one in person.
I'm not saying that it WASN'T height discrimination; I'm just saying that you should be careful about concluding such things so easily.
It's possible to nit-pick potential reasons for bias against some unknown stranger on the internet while discounting his actual experiences and feelings.
I've had to be more careful about my appearance, of course. My clothes fit well, I'm lean, and I work out.
Despite my diminutive stature, men get out of my way, because I look strong and I walk confidently. Men didn't do this until I got strong.
I get looks from girls all the time. They don't seem to care that I'm in about the 2nd percentile, height wise.
Attitude about height is often more important than actual height for a man. Things would probably be easier if I were taller, but being short is far from the insurmountable obstacle it's made out to be.
My weight percentile is around 40%. I feel good about that compared to my height percentile, since it's muscle and not fat.
It's also an example of how short =! disrespected, as OP was implying.