of course it is, it's just a type of tourism and most 
people don't even know they are "dark tourists" just 
visiting ground zero, seeing family grave site or traveling 
to see the pyrimids of egypt makes someone a dark tourist.
ethics souldn't even come into play. Unlike sex tourism now 
thats not ethical

accomodation

sustainable tourism development means ( meet the present 
needs without compromising the ability for the future
generation to get they own needs ).

Many tourism occupations involve working with the public, 
particularly in front-line positions. If you love working 
with the public, there are plenty of tourism careers that 
would suit your personality and your outlook. However, 
there are many other tourism-related jobs behind the scenes 
in cooking, marketing, technology and landscaping, for 
example.

Not at all.  The variety of occupations found within each 
sector is as diverse as the sectors themselves. Jobs can 
range from organizing a jet boat tour to developing 
marketing strategies, from creating a web site to preparing 
a gourmet meal.

Many. Changes and advances in technology have had a major 
impact on the world. The tourism industry is no exception. 
For example: hotels have computerized reservation systems 
and online reservation systems through their websites. The 
use of the Internet to market and sell services is a major 
part of business today.