Why didn’t all the people who signed the Walker recall petitions bother to vote yesterday?

There were over 900,000 signatures (supposedly valid signatures) on the petitions. That's over 200,000 people who forced this expensive procedure on the state and then didn't care enough to participate.

Who are those people?
	They don't exist. The petitions had that many fake names.
	They changed their minds and support Walker now.
	They signed the petitions because they were afraid of what union thugs and others might do to them.
	They were just weak people succumbing to social pressure.
	They're lazy. It's easier to sign than not sign, but a bit of trouble to vote.
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(Just pick the best answer. Your desire to vote "all of the above" or 2 or 3 of the above can go in the comments. Those answers make boring results in a poll like this. Deal with it. This isn't pollster science I'm doing here.)