If you google <asbo "civil liberties"> you will do yourself the twin favours of finding out that
1. Mostly it get used as ASBO - the usage Asbo may suggest a growing familiarity with the word (expect the verb to be formed around lunchtime tomorrow!), and
b. A lot of people have serious concerns about this measure as yet another derogation from the ancient traditions of jurisprudence (hearsay evidence can result in an ASBO being granted for behaviour found unacceptable against relativistic social criteria, a breach of which in turn can render a citizen a criminal ~ having not previously been accused of a criminal act)

It's also in the news today in the context of the new Chav, er Collins Dictionay:

http://news.bbc.co.uk/1/hi/uk/4074760.stm