Yes, deliberately wasting the time of medical professionals is wrong, on many levels.
But it takes two to tango. Dealing with hypochondriacs or folks who come for pleasure, not for health issues, is part of the job. Not easy, and a very thin line sometimes, coz even the annoying hypochondriac could have something serious one day. But when a flirtatious patient in a skimpy skirt with rather vague concerns about "tummy ache" is obviously trying to manipulate you into giving her a pelvic, you needn't make her drop her knickers and probe her private parts to reach a professional diagnosis. And if you DO decide to spend this extra time twiddling her privates, let other patients wait and charge the insurance company for it, who is the culprit?
Don't get me wrong, there is no justification for misusing the help of doctors, nurses, policemen, firefighters etc. But professionals shouldn't allow anyone to easily manipulate them.
In my experience, the really annoying problem is people wasting the time and sleep of already overworked junior doctors by turning up at a hospital ER in the middle of the night with issues that can easily be dealt with by your GP and a regular appointment. Sunday 7 a.m. "I have a slight headache today, and ran out of aspirin"; Thursday 3 a.m. "I've had this spot on my skin for many years now, and it has gotten a little bit darker, don't you think?"; Saturday 9 p.m. "Here are my three grandchildren, please give them a check-up, we're going on holiday tomorrow and want to be on the safe side." All real examples, not made up.