Here’s my take on ratfucking, if you’re so inclined. If you are in a state with open primaries, vote for Cruz, not Trump. If Cruz wins (unlikely), he will be a worse general election candidate. If Cruz denies Trump a majority of delegates, Trump will have to cut an ugly deal to get some other low-energy loser’s delegates, or the GOP powers-that-be will engage in an ugly floor fight. If Trump is denied the nomination because of a floor fight, he’ll run an independent campaign. Any of those outcomes are good for Democrats.
That all said, Trump is leading in winner-take-all states like Florida and Ohio, so he’ll probably roll up a majority of delegates in much the same way that a dung beetle rolls up a ball of shit.