Opposition to hunting is espoused by people or groups who object to the practice of hunting, often seeking anti-hunting legislation and sometimes taking on acts of civil disobedience, such as hunt sabotage. Anti-hunting laws, such as the English Hunting Act 2004, are generally distinguishable from conservation legislation like the American Marine Mammal Protection Act by whether they seek to reduce or prevent hunting for perceived cruelty-related reasons or to regulate hunting for conservation, although the boundaries of distinction are sometimes blurred in specific laws, for example when endangered animals are hunted. Animal rights activists argue that hunting for sport is cruel, unnecessary, and unethical. They note the pain, suffering and cruelty inflicted on animals who are hunted. The term anti-hunting is used to describe opponents of hunting; while it does not appear to be pejorative, it is widely used as such by pro-hunting people. It is difficult to compare strength of anti-hunting sentiment in different countries, for example because the word hunting carries different meanings in the UK and United States. Nonetheless, it is more possible to compare the strength of the anti-hunting movement in different countries, with some having stronger organization, such as in the UK, and some being nearly without it, such as New Zealand. Opinions can vary widely on different surveys even within the same country, and as in all market research, consideration must be given to recent events that made the news and the wording of the questions, both of which can influence results. The Burns Inquiry analysis of the opposition to hunting in the UK included social class, sometimes proposed as a differentiating factor between hunting in the UK and hunting in the United States, as one among many anti-hunting concerns. Furthermore, they showed the UK's anti-hunting movement was itself only part of a wider, grassroots opposition to hunting in the UK.