Bitcoin is often treated as a haven for black market buyers and people who want to avoid illegitimate laws. However 3 simple steps would suffice to mostly obliterate Bitcoin for black market usage of ordinary users.
Three steps to break Bitcoin for small scale anonymous usage:
An answer to a reddit-comment by tedemang to the article 1540 Anonymous vs. TrapWire: "We must, at all costs, shut this system down and render it useless".