couple of points.
There are obviously people who spy. Guess it is what they like to do, I have a hard time understanding why they do it, why it is fun, and why the spend time doing it...That said, I have a hard time understanding why people do many things in this game. However, I can somewhat relate to the feeling that only a small group of people will intentionally set out to grief another group, has happened to many of us. It may not always being spying, but the method does not so much matter. It's the lack of respect for the rest of the community.
No one likes to be painted with a broad brush. No one likes to be falsely accused of things. On top of that, no one likes to be falsely accused of on-goings that they don't care about to begin with. When you paint with a broad brush, then add words like liars, bozo's, trouble childhood, loser, etc...you are bound to get some form of response. You go far beyond how someone plays the game, and start getting into the realm of personal attack. Many have thick skin and don't get upset, but they aren't going to turn the other cheek either and will gladly play along.
In your example of skyrock above, I've known him for a long time, flown with him in 2 squads and had quite a few conversations with him. What would have happened if while flying in your mission, someone from his squad had ran into in accidently. Somehow I have a feeling, though he didn't relay any information, he would have been on the recieving end of more than a few comments. I just use an example like this to point out, that missions get busted in many ways, some of it is luck, some of it is noticing a quick bar which disappears quickly. Some of it involves others fanning out and running recon in fast planes. Sadly this same luck and circumstances can be immediately blown way outta proportion. There are many ways, and just happening to come upon a mission, doesn't mean it was ratted out, no matter how well planned.
As far as being trusted, is just not something I worry about. In my experience, the few missions I join, I usually made by people I know, who I'd like to fly with, and who are attacking a target that seems fun. If I joined a mission (very rare), and a bunch of people freaked out, start talking behind my back, making false assumptions and the like, oh well, I'm just not going to be bothered by someone elses paranoia.
In the end, spying is going to be here, as it has been for many many years. I just don't see the point of trying to take away privilages of 99% of the population, because %1 are idiots. I personally think there is way to much emphasis on this whole topic, far too many allogations supported by "evidence" victimizes honest people being caught (depending on your view) in the wrong place and the wrong time. Long post, just wanted to convey my thoughts.