Personally I see nothing wrong in the "Park & Ride" Caches., having placed 6 historic caches which get a lot of visits I thought it would be fun to do a few "quickies", and "no" to the person who thought they might be boring, all of my caches are placed in woodland, slightly away from the actual "Park & Ride". There are people out there doing it purely as a numbers game - and good luck to them. I can assure you I have done much more uninteresting, boring and sometimes quite dangerous caches. So don't knock those of us who are trying to make things a bit more fun and interesting for other cachers. Caching should be a fun hobby where you sometimes meet (at Meets) others with a like interest, don't let's degenerate it into a moaning, arguing - "My cache is better than yours!!" argument. Let everybody have fun and play the game as it suits them.
Surely this is no worse than any other cache. Let people enjoy themselves and do what caches they wish, after all nobody is making them do them. It's purely a matter of choice.
Incidentally we go to great lengths to make sure our "historic" caches are accurate and of interest, and enjoyable for all concerned and have gone to a lot of trouble to get permission to place these caches where needed on private land.