The reason people should be banned from Antarctica is simple. Many years ago after Scott and Amundsen completed the famous race to the south pole, many were interested in the tales of the ice, and decided to investigate. Tourists, scientists and glaciologists moved to antarctica for various reasons. The Antarctic Treaty was introduced but regulations were not always met. Some started hunting the whales and seals for sport and cash. Litter was left behind and over fishing left the penguins hungry. Pollution was almost overwhelming for the rare animals inhabiting Antarctica, and became at risk of becoming extinct. Mining for many minerals and oils embarked and eventually it would ruin Antarctica.
+++ Those are very valid reason with which I agree, especially the mining, but that does not mean people can't visit Antarctica as tourists or scientists provided the very highest precautions are taken to protect it and its wildlife.
Another Answer
The Antarctic Treaty became effective in the 1960s, and violators can be charged with international crimes. There is no commercial fishing allowed. No animals live on the Antarctic continent: it's too cold and there is no food chain. Mining is expressly prohibited by the treaty, and its practical challenges make it economically prohibitive.
Antarctica -- and all of earth south of 60 degrees S -- is preserved for science. Scientific research stations on the continent support countries representing 80% of the earth's population, in the study of planet earth's health.
The tourist traffic business to Antarctica is thriving and well regulated.
Countries around the world. LOL
There are hardly any tourists that go to Antarctica
There is no evidence in the argument to limit the number of tourists in Antarctica.
The tourists go to Antarctica during the summer or the winter
Generally, tourists go to Antarctica to tour -- it is the most exotic visual landscape on earth.
Tourists may want to earn bragging rights to say that they've been to Antarctica.
Tourists visiting Antarctica are housed aboard the ships used to sail them to the continent. Tourists who charter private expeditions to the continent bring their own tents and other equipment for shelter from this extreme environment. There are no commercial tourist facilities on the continent.
There is no disadvantage to any continent caused by tourists.
Tourists who visit Antarctica by ship stay on board the ship. There are no commercial accommodations anywhere on the Antarctic continent.
All tourists who visit Antarctica arrive on tour boats, which also provide all hospitality during these journeys.
Tourists do go to Antarctica. They travel by ship from departure points in New Zealand, Australia, Chile and Argentina.
Tour season in Antarctica is generally December and January.