While you will not find any of these problems yourself being a genuine tourist, and while I consider it to be a bit "over the top" and paranoia laden - I believe you should read this article as it's a very good description of current affairs in Cuba.
http://www.worldaffairsjournal.org/blog/michael-j-totten/welcome-cuba
Nino
PS : Thanks to Gino for posting it on AmiCigar.