Petitions:

You pay taxes - why shouldn't the 'church' of $cientology?
Sign the petitions to revoke scientology's tax exempt status in the USA:
http://www.petitionspot.com/petitions/stopscientology
http://www.petitiononline.com/cofs1/petition.html

Scientology does not have religious status (ie tax exemption) in the UK and e-petitions have been set up requesting that the government continue to 'Refuse any application submitted by the 'Church' of Scientology for recognition as a Religious Organisation in the UK'. Others are requesting an investigation by the Inland Revenue into treatment of scientology staff in relation to minimum wage laws and demanding legislation to bring about severance of any links between scientology's front group 'Narconon' and the British police force, schools and other publicly funded organisations. The petitions can be viewed (and signed by British citizens or residents) by logging on to the Downing Street website:

http://petitions.pm.gov.uk/StopNarconon/
http://petitions.pm.gov.uk/scientologyno/
http://petitions.pm.gov.uk/-Scientology/
http://petitions.pm.gov.uk/anti-scientology/
http://petitions.pm.gov.uk/PoliceandCoS/
http://petitions.pm.gov.uk/ScientologyNMW/#detail

".....the protections that we enjoy for freedom of worship exist so long as we don't step over the line, when religious worship and belief cross over into things like fraud, victimization of others and the disruption of the political arena, that protection is no longer appropriate."