Are you sure? Do you mean here in FR when you say "many"?
I'm not seeing much of it at all, at least not this early in the season.
For example, maybe I didn't notice but I haven't seen anyone post "as bad as Bush is, I would vote for him against Hillary".
Have you seen that here in FR?
You are correct, I haven't yet seen anyone say they'd vote for Jeb "against" Hillary, but I saw people swearing to their toes they'd never vote for Romney, maintain their steadfast course until the end of August in 2012. By that reckoning, we're more than a year out, so there's plenty of room for playing chicken.
If the candidate is offering what I WANT -- so far, Cruz is the only guy who has a political philosophy that gets it -- I'll vote for that candidate. PERIOD.
A candidate with zero political philosophy or compass and a past of left-leaning passion, is as big a risk as Schwarzenegger and Bush. I try to review my mistakes and apply what I've learned. Which is why these days, I only vote for what/who I want to win. I know that I don't get to vote "against" no matter how "unfair" it is.
Peace to ya, Bro FReeper.