No, I cannot say I have been with a person whose greatest fear is being bound. It makes sense to me that this would be a huge fear, which is why I suggest that before you cross that line with a person, you completely trust them and know they have your best interest at heart.
Personally, I don’t understand bondage with a stranger.
I understand rough and passionate sex in a hookup situation, but not bondage. You may have some sadistic serial killer on your hands and once you are tied up you really have no choice but to accept what is happening. Even everything goes fine, the trust that you built before is part of the experience, so not having it seems like a key element is missing. That’s just my opinion, I suppose.
How would I handle it if my sub’s biggest fear was being bound? We’d talk about it a lot. I mean a lot. And if the time came that she wanted this, I’d usher this experience in with her and be cognizant of her fear during the process and make sure at the end her trust in me was greater, not less, and that she’d have a positive experience.
I’d probably keep the blindfold off the first time, just tie her hands up and not feet, and ahead of time, I’d ask her to use her safe word just so she understands and sees that I honor it.