I've been asked how to create a project that allows for user polling where a user can cast only a single vote. Here's a quick attempt, have a go and see if it works for you. For a true poll you may prefer to not make the current results visible until after the user casts their vote to ensure an unbiased result? You can do this easily using the "> Not yet voted" & "> Already Voted" broadcast receivers and show or hide the variables in there.
