Good point about staff knowledge AOTW but really that should be security 101 these days now that the rules have been in place a while. The issue is the RPT apron if it is an SRA. No amount of ASIC's, uniforms, common sense or righteous indignation is allowed on an SRA unless you are related to the RPT aircraft in some way or have specific approval to be there from the person named in the security manual. It's why, at a lot of airports I've been to, provided you stay away from the terminal frontage, no-one seems to care ( mainly because no one has the staff to police it all).