I’ve heard that Scientologists are doing good things for society. What are some specific examples?
Implicit in the Scientology worldview is a mandate to employ the truths of Scientology to uplift Mankind. Consequently, as Scientology grows, so too the humanitarian programs Scientologists support. Those programs now include:
Additionally, through the Citizens Commission on Human Rights  Scientologists have further spotlighted and worked to outlaw the enforced drugging of schoolchildren, the psychiatric brutalities of electric shock and lobotomy, and biological warfare experiments.
Finally, the Church was among the original champions of the Freedom of Information Act  and other access laws to protect the public interest and end government human rights abuses.
In conclusion, then, the Church of Scientology and Scientologists work in alignment with the Aims of Scientology and the dream of a “civilization without insanity, without criminals and without war, where the able can prosper and honest beings can have rights, and where Man is free to rise to greater heights.”