It’s a tool or a curse, and it comes down to the sentence, “I’d be embarrassed to do that.”
If you’re using it to mean, “I would feel the emotion of embarrassment,” you’re recognizing one of the most powerful forces of our culture, a basic human emotion, the fear of which allows groups to control outliers, and those in power to shame those that aren’t.
The stress that comes from merely anticipating the feeling of embarrassment is enough to cause many people to hold back, to sit quietly, to go along.
And this anticipation rarely leads to much of anything positive.
On the other hand, if you’re saying, “doing that will cause other people to be embarrassed for me, it will change the way they treat me in the future,” then indeed, your cultural awareness is paying off. There’s a reason we don’t wear a clown suit to a funeral–and it’s not precisely because of how it would make us feel to do that. It’s because insensitive, unaware, selfish acts change our ability to work with people in the future.
Most of the time, then, "I would be embarrassed to do that," doesn't mean you would actually be embarrassed, it means you would feel embarrassed.
In most settings, the embarrassment people fear isn’t in the actions of others. It’s in our internal narrative. Culture has amplified the lizard brain, and used it to, in too many cases, create a lifetime of negative thinking and self-censorship.
So, yes, by all means, don’t make us feel humiliated for you, don’t push us to avert our eyes. But when you feel the unmistakable feeling of possible embarrassment, get straight about what your amygdala is telling you.