There has always been a fragile relationship between volcanoes and tourism. Volcanic features are some of the most fascinating in the world — just look at the millions of people who visit Yellowstone or Crater Lake National Parks for but two examples of hundreds of volcanic tourist attractions around the world. (And that doesn't even consider all the extinct volcanoes or volcanic deposits that can create amazing landscapes as well).
However, with the splendor of volcanic features comes the danger that you, as a tourist, are visiting an active volcano. Sometimes, that danger is low, where either the volcano has been dormant for thousands of years, but the signs of magma beneath are still visible. However, the danger can appear to be low in some places but in reality, you are literally putting your lives in the hands of tour operators when you make the visit.