This is why privacy centric currencies like Stealthcoin are needed along with Tor and other programs.
The only problem is, I worry that maybe some of these coins and technologies are being made by gov'ts (under a disguise of being anonymous) in order to secretly monitor what types of things are going on.
Kind of like when there was the scare of so many tor nodes being watched by gov.. or is that still the case?
How do we determine all of this?
The only true solution is to adopt an Open Source policy regarding technologies. The thing is, most of these coins are competitors and people routinely copy and paste whatever opensource code devs put out there; so they are wary of it. Some coins have opted to be closed source and only reveal their code many months after delivery to ensure at least a proper hold of the market.
Stealthcoin devs are still in the process of delivering the new Stealthsend and I doubt they will open up the code for a while. What they have done is reached out to Den Metcalf (from XC) and they asked him to do a third party audit. He cheked out the code and did many tests ultimately telling everyone that the Stealthtext features works just as advertised by the Ann thread. So yeah, there is some trust but Den Metcalf is amongst the most respected persons in crypto so his thumbs up gave many in the community a pretty big boost of confidence.
If you go back long enough you will find positive comments from devs of other coins including a few by Blackcoin devs.