There is room for differing opinions and differing management strategies here which will reflect a persons values and objectives and I venture how succesful their apiary is. Most of the UK countryside and it's fauna is as it is because of mans manipulation, like it or not!
Wasps have their place of course, they are one of the major natural scavengers, and they eat insects such as flies and caterpillars, when the insect protein sources run out apiaries can be a one stop shop for them.
If food sources for wasps are plentiful then I do not accept that my traps will attract from miles around - they are afterall no more or less attractive to a wasp than a rotten apple on the ground would be - or a rubbish bin - a dropped ice-lolly etc! If they are in range and attracted then there is no question that I want them in my traps not in my hives.
If you are looking for an 'eco' balance to assist your decison which does more good to the general environment, pollinating bees or predatory wasps?
I'd enjoy reading alternative view points. R