This might actually make Anthropic very popular among those who do not support the current US presidency, a significant market share.
Take notes other AI companies. This is a totally fine line to draw and it's not even that high bar. Dont allow systems to be built with your AI that automate mass surveillance or automate kill decisions.
those systems will be built regardless. That type of boycott being asked from companies is essentially asking companies to not make profit where there's profit to be made, when those doing the asking is not also taking in any sacrifices for this boycott.
Instead of asking companies to be altruistic, those wanting such systems to be illegal should be using the civic system we have today to make it so - yes, this costs effort, resources and time. Like all hard things.