Final answer:
A ban on exporting advanced technologies might lead to increased black market activity, revenue loss, strained international relations, and stifled innovation.
Step-by-step explanation:
Placing a ban on the export of advanced technologies can have several potential drawbacks. One major issue is the increase in black market activity as those seeking the banned technologies turn to illicit sources. Additionally, there would be a loss of potential revenue for companies and the country as a whole, which can stymie economic growth. Such a ban could also lead to a negative impact on international relations, as countries dependent on or expecting these technologies may feel alienated or discriminated against. Finally, this could stifle innovation and technological advancements, as companies might reduce investment in research and development if they cannot access international markets, potentially leading to a decline in overall technological progress.