First Amendment justice

I haven't taken a single law class, so am posting in a state of ignorance. If I understand the current jurisprudence on freedom of speech (huge if), then whatever moron launched the "Should Obama be killed" Facebook poll may not ultimately face legal penalties.

After doing a little surfing, I found the following on Wikipedia:

The doctrine states that speech that will cause, or has as its purpose, "imminent lawless action" (such as a riot) does not have constitutional protection. As of 2009[update], "imminent lawless action" continues to be the test applied in free speech cases.

It seems like there would be sufficient distance between taking a Facebook poll and "lawless action" so as to protect the poll under the First Amendment. Let's hope there is some other legal route by which the creator of this poll is punished.

To discuss the impeachment of a president (as some on the left did for much of Bush 43's presidency) seems to be well within acceptable speech. If someone doesn't like Obama and wants to put "Impeach Obama" bumper stickers on their car, let them. I don't agree with them, but recognize their right to that kind of speech. But "Should Obama be killed?" crosses the line.

Let's hope that the perpetrator of this poll is caught, and justice is served.