I don't understand what you mean. What is it about these flights that would make it impossible to prohibit them from flying under the 33 approach while it's in

I don't understand what you mean. What is it about these flights that would make it impossible to prohibit them from flying under the 33 approach while it's in use, or prohibit incoming traffic from landing on 33 while these flights are nearby? Why can't they use ADS-B?