Once again, that is one way LEO's catch perpetrators. They cannot keep their big mouths shut.
BTW, teal is also a color. http://en.wikipedia.org/wiki/Teal_(color)
Yes, it is one way they catch folks. Unfortunately, they apparently don't appear to be doing a good job of it with these punks so far. Your initial comment was:
Hm, you can't exactly brag about doing something illegal like writing viruses when the bragging will send you to jail.
Duh.
Just because it is not the most intellegent thing for them to do does not mean that they don't do it. Many also make use of pseudonyms and are adept at hiding the true source of their comments. There are ways to do this very effectively, and they are used extensively.
If there were effective attack vectors against Macs and the various flavors of Linux out there, you can bet that someone would be scrambling for the bragging rights that would go to whoever created a novel worm/virus that was able to spread even somewhat efficiently. Earlier, I posted an example of a worm that attacked a target of just 15k hosts worldwide. Are not the several million Mac/Linux users out there a much bigger target than that?
The comment about "teal" was a joke to the poster. Did you not see the ":)" which, in general terms indicates the comment is not to be taken entirely seriesly? Lighten up, Francis.