Tourism
"All those industries that are based upon travel and tourism will shrink or, in some cases, disappear altogether as people are unable to go abroad like that."[1]
Space travel
"Do not think there is a lot of tourism in the Greater Community. Perhaps between trading nations there may be. It is the problem of biological hazards. You may travel to another world to visit a museum or some kind of natural feature of that world, but because you are not of that world, there is always the problem of biological contamination. And this problem has not been universally solved." [2]
"Do not, then, look at the Greater Community as a vast resource awaiting your exploration. Do not think that it is a big playground where you can go and enjoy recreation, traveling around as a tourist, having adventures and so forth. These motivations all demonstrate that you do not take your life seriously and do not recognize the greater opportunity your life is giving you to discover your deeper inclinations and to find a greater fulfillment here." [3]