That does soooo wind me up....have a look next time you are at Schipol or LHR!
I can't say I've ever taken a light aeroplane into either - how often do you do that?
I have been into other nearly-as-busy heavy-metal airports, but generally the ground environment is controlled enough that other methods are used to stop people walking into stuff (marshallers, call for start, mandatory airside training, very tight airside access control).
But we are talking about light GA here. If I start up at Popham I'm in a different environment to, say, Southampton. I sort of assumed that this thread was about the Pophams of this world?
G