Steroid-using athletes remain undetectable

Recently Alan Abramson wrote an article where he noticed whether tests conducted by the World Anti-Doping Agency (WADA) were efficacious.
The WADA conducts many tests for steroids and other related preparations every year. It seems that steroid users are caught. Someone may believe that the world of sports and professional bodybuilding will be soon cleansed from administration of banned drugs. For example, numerous tests for banned drugs have been conducted at the 2012 Summer Olympics.
But several questions appear here. Are these tests sophisticated enough to detect any sportsperson that dopes? Are these tests reliable?
Let meditate over results of some tests. In 2010 the WADA published statistics according which 258,267 samples were analyzed by 35 WADA-accredited labs. Out of these samples 4,820 results represented atypical findings. Circa 60 % of positives indicated about steroid use. Many positives were for cannibinoids. 10 % positives indicated about application of marijuana. As you see, just 60% out of those that took banned medications applied steroids. Is it real? Don’t demonstrate the results of the tests that the WADA doesn’t do the job properly?
The former president of the WADA Dick Pound believes that at least 10 % of sportspersons that competed at the 2012 Summer Olympics took steroids. He notes that those steroid users that are not clever are caught by anti-doping agencies. He also claims that a sportsperson who has been caught doping will fail an IQ test. He adds that just unwise athletes don’t avoid detection.
Thus, when you hear that the WADA has conducted many tests to make sports clean, consider whether these affirmations are true. Has the WADA ability to make competitions fair? Why does the WADA publicize about number of tests?
It seems that the WADA only wants to convince people that the job is done properly. The WADA desires to secure future funds. This is the reality.