The term ‘cult’ can be used in a positive, negative, or neutral sense. It does not necessarily have a pejorative meaning, although the term has taken on negative connotations — precisely due to the behaviour of some groups that have been identified as cults.
The ambiguity of the term ‘cult’ makes it necessary to identify or determine in what sense the word is used.
Note that the term ‘cult’ can be defined either sociologically or theologically. Sociology concerns itself with behavior, while theology concerns itself with doctrine. [More about the differences between sociological and theological definitions of the term ‘cult’]
Also, in some countries the term ‘sect‘ — equally ambiguous in meaning — is used instead of the word ‘cult.’
More information:
• Cult FAQ — Frequently Asked Questions About Cults, Sects, and Related Issues
• Cult Definition
See also:
The upcoming trials of the last three Aum Shinrikyo cult members will inevitably revisit the atrocities committed by the cultists, whose spiritual pursuits under guru Shoko Asahara claimed 29 lives and left more than 6,500 people injured. 
The Cult Information Centre, a UK charity that warns people of the dangers of cults, is set to have its funding withdrawn. After 25 years in operation, the Cult Information Centre in England fears it may no longer be able to work effectively. 
A panel of academics and professionals from Israel’s Ministry of Welfare and Social Services will meet Thursday to discuss the possibility of creating legislation to legally outlaw sects and cultish practices in Israel. 
South Australia’s chief prosecutor is calling for new laws to thwart the rise of cults across the nation. Global fears of economic or environmental upheaval feed the growth of gurus and damaging cults that prey on the weak, a French government expert on cults has warned during a visit to Australia.