Comment: You can create a bunch of fake email addresses and then

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In reply to comment: Its not just one person (see in situ)

You can create a bunch of fake email addresses and then

give them different "names" on the Whitehouse.gov site.

Look at each petition. All but about 5 or 6 read verbatim like the original one for Louisiana.

It's a copy and paste job.

I wouldn't even be surprised if someone set up a signing script, though I don't think that would be necessary save to get it to 150 so it shows up on the search results for the site.