Write-ins is the worst possible move for our movement. It doesn't send a message at all. Write-ins are not counted in Presidential Elections. Why, its because we don't vote for President, but we vote for his/her Electors. As in Electoral College. I'm from Pennsylvania, and we have 20 Electors, for a write-in to work you need to write-in 20 names, but our electronic ballots wont let it. If you don't write-in your Electors, then the write-in vote wont count. So just writing in Ron Paul, doesn't matter what state, the vote wont count.
Voting for a candidate on the ballot, especially a third party will send a message. Just imagine if one of the 3rd partys can get 15+%, that will send shock waves.