Questions about Portal Security - SPOILERS
1. To cross over and visit the other side, you need a visa. What kind of vetting, if any, is performed on visa applicants?
2. Why doesn't each side investigate its visitors' local counterparts to see who and what they are before approving the visitors' visas?
3. Why is there no monitoring or process to prevent a visitor from interacting or switching places with his/her counterpart? Why isn't this be a concern? There's a Cold War between the two worlds, right?
4. Why would they let visitors in who have counterparts in important or sensitive gov't positions? And then not investigate and monitor those counterparts for their own safety?
5. If vetting and monitoring all visitors and their counterparts would consume too many resources, why not limit the number of visas they approve to a number that can be monitored?
6. Each world knows they have their own self-interested, opportunistic motivations, and have ambitious and unscrupulous people in positions of power who will be tempted to misuse the portal. So shouldn't each side assume the other is no different? They don't seem to assume this. Isn't a little healthy paranoia called for here?