I don't know what airport you are at but I can assure you that what you describe does not happen on the majority of airports.
The type of operation you describe would be run off the airfield here. Which airport are you at? (PM me if you can't say on here) Do you have an Airfield Operations Manager with any experience? It sounds like no one at your airport has any idea about what they are doing. They could benefit with a visit to a proper Airfield Safety Unit.
CAP 700 is a good starting point (The Bible) and CAP168 would be worth a read....
In answer to your question, yes they are worth having......However your airport sounds as though it would be better of without...
Good luck...But, I think in the name of safety you should make complaints to the airport authority and if you have no joy there complain to the CAA.....