I don't want to register there and flood their forum with Ron Paul supporters, but please post something like this regarding the electability/waste of a vote issue:
This was copied from this website:
http://www.3pc.net/essays/fallacy.html
Voting for a candidate other than your favorite has the exact opposite of the desired effect. If your beliefs exactly match those of some particular candidate, then you ought to vote for them. Of course, this never happens, so you have to pick the lesser, or the least, of several evils.
Suppose you, and people like you, almost always vote for candidates from one of the two major parties. If you do this, the optimal strategy for the parties is to IGNORE you completely. Since the candidate already knows that your vote is in hand, he can then concentrate on moving the platform AWAY from your wishes, in order to court the votes of people with beliefs far from your own.
For example, many people who like Libertarian ideas always vote for Republicans. What does the party do to reward them? They make policies to win over moderate liberals.
So the idea here is that if you like Paul but support Romney because he has a better chance at the nomination then there is no reason that the Republican establishment would practice Paul's ideas of limited government and strictly following the constitution. They will just take your vote as a vote for Romney's ideas of raising taxes, health mandates, ect.
Also explain that if you are voting for Romney so that we do not get McCain then you are essentially letting other people determine your vote. If this is the case, why not then vote for McCain because he has better independent appeal and therefore a better chance at beating Hillary in the general? Or why not go register Democrat and vote for Obama because you do not want another Clinton? The bottom line is that the way to get what you want out of your vote is to use it to express the ideas in which you believe in so that those ideas can wield power.