I suppose it goes back to the truism that the plural of anecdote is not data. In general, I view voting as a freely chosen act. No one should feel bullied into voting for a general election candidate they don't truly support. If someone wants to make an informed decision to vote for Jill Stein or to not vote at all, I can't stop them. I just wish they would acknowledge that (1) there is a policy difference between Trump and Clinton, and that (2) some Americans would suffer grievous harm under a Trump presidency.
I agree entirely with you, except that I wouldn't call voting for Jill Stein "an informed decision." It's a decision made from privilege and ego ("My conscience! My conscience!") rather than from a generous and compassionate view of what's good for the country.
I don't know why anyone would consider Jill Stein a serious candidate. What has she done?
But beyond that, don't we want what's best for our country, rather than what's best for our individual egos?
I hope so.