While certainly there are those who will publish findings they know to be false, that's not really the big issue I see here. Good science demands that studies be replicated so they can be upheld or refuted. Sure, there's confirmation bias in science all over the place - the bigger problem I see is that there's very little incentive to publish a paper that simply refutes another. Busting existing studies should be a glorious field, but it's not. If big-name scientist A publishes a result in nature, and no-name scientist B publishes a paper in the journal-of-no-one-reads-it, everyone just assumes scientist B is just a bad scientist (assuming he even managed to actually get published at all).
Another major issue is that the null hypothesis is a very un-enticing story. No one wants to publish the paper: "New Drug does nothing to cure cancer". If you spent a year and a ton of money researching New Drug, you're damn sure going to try and make it work. It's unfortunate, because often the null hypothesis is very informative, but it doesn't get you paid or published. Or how about the psychology paper: "Brain does not respond to stimulus A in any meaningful way", don't remember that paper? That's because it never got published.
I think this is less about malicious behavior, and more about a lack of interest (which can somewhat be blamed on the way universities/journals/grants handle funding, notoriety, etc) in replicating and refuting studies.
Do you want to be the guy who cured cancer, or the guy who disproved a bunch of studies?