The CV's from newbies offering to work for nothing aren't the problem. Airlines are far from naive - they know how desperate people are for that first job. But for the reasons already stated they know they have to pay people. Anyone putting that kind of crap on a CV will just be viewed as an immature idiot. Remember, when an airline hires a new F/O, they are looking for someone who will with time and experience be capable of becoming a Captain. One of the many qualities a Captain needs is the ability to stand up for him/herself down route when it's all turning into a ball of chalk. Now saying you'll work for nothing tends to give the impression that you can't even stand up for yourself......so CV filed in bin.
So these CV's will not influence the airlines one way or another. Unfortunately the real problem comes from those who already have jobs - with the wide range of ages, hopes and aspirations found across the board in any pilot workforce, managements find it very easy to divide and conquer, the end result being that pay gets driven down and the workload goes up. This is where the real problem lies.