why is a soferet like a swordfish?
If I work on a Torah for someone, it's as if I cooked swordfish in their kitchen. They can no longer share resources with Orthodox or non-egalitarian Conservative groups. If I cook swordfish* and I'm hosting Orthodox guests, it is an appalling desecration of trust not to tell them about it. If I repair a Torah and then let Orthodox congregations use it, it is likewise an appalling desecration of trust. If we want respect, as Jews or as human beings, we have to give respect, and part of that is accepting that other Jews' rule systems are valid despite being different from ours.
Before I work with any client, I make sure they're aware of this. People must know that if they hire me to work on their Torahs, it's like making swordfish in their kitchen. If they want to hold open the option of sharing their food, or their Torahs, with people who are more traditional, they must not cook swordfish and they must not employ me to work on their Torahs.
All non-traditional scribes have this responsibility. We MUST make sure our clients know what they're getting into. That their Torahs will be considered pasul by the traditional end of the Jewish spectrum, and that giving those people such a Torah to use for Torah reading is a terrible, terrible thing to do, just as it's a terrible thing to sneak pork to Jews who don't eat pork. Our clients may choose to support us and so forfeit sharing resources with those who don't agree, just like they do with their kitchens, but we must ensure that they are making an informed decision.
In my experience, even really learned people don't necessarily know that a soferet is like a swordfish. We cannot ever assume that our clients have already made their decision just because they are talking to us, even if they are learned. We must not ever assume it. We must be explicit, each and every time. I am like unto a swordfish, said the soferet.
Rabbi Yishmael said to Rabbi Meir that as a sofer he had the potential to destroy the entire world. We have the potential to destroy trust, and the responsibility not to. In this, a soferet is considerably more dangerous than a swordfish.
* Not that I do cook swordfish. But if I did.