Competitive advantage is a moving target.
Once a competitive advantage has been achieved, action must be taken
to maintain it or competitors will quickly try to eliminate it. One
of the techniques used by organizations to prevent competitors from
catching up is to protect what is know as "intellectual property".
The primary vehicles for such protection are trade secrets,
copyrights, and patents. Copyrights and patents give the claim holder
exclusive rights to a concept, idea, or product for a length of time.
During that time, the claim holder can prevent competitors from
using the protected concepts, ideas, or products.
Copyrights and patents have become a controversial subject in recent
years. Governments have been increasingly strengthening copyrights
and patents. At the same time it has become clear that many copyrights
and patents have suppressed innovation. This has led many to question
what the real purpose of "intellectual property" laws are and should
be.
The Digital Millennium Copyright Act (DMCA) is a law passed in 1998 that
increased penalties for copyright violations and made it illegal to
circumvent copy protection (or even tell people how copy protection can
be circumvented). The DMCA is often used to force websites to remove
content that a company would rather not have publicly accessible. This
often includes material that is not infringing any copyright - but many
website operators do not have the time, resources, or interest to
investigate and fight such requests. Website operators often just comply
with DMCA takedown requests because it is easier and safer than risking
becoming liable for penalties for not complying with the request. Wikipedia
has an article which explains the
history and content of the DMCA.