You cannot automatically use the object for the user, and you cannot submit it through the API. This does not allow anyone to "secretly" have users as pages / objects.
The solution is to insert a similar button on your page and give users a clear reason for using [sell profit to love your page]. You can launch a separate version for individual pages, objects, or just an aggregation button for your entire site using the data-href element.
http://developers.facebook.com/docs/reference/plugins/like/
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