Software use is a big analogy IMO. I know a lot of people who will license at work because they have disgruntled employees calling the Piracy Hotline and thus a "risk management" postion driving policy and procedure at work and yet not at home. At home they may pirate like the dickens. Professionally these actions would be incongruent ethically and yet personally they may be congruent, as even though it is against the law, our society does not yet see piracy as "bad" generally- even though professionally it is increasingly discouraged. Interesting, eh?
To get on topic though, I fundamentally believe that a city (or person) divided will fall. Actually, this is what is bugging me about the American politicol dualism right now. We aren't unifying over anything really- just creating deeper division- but that is another topic.
To me, this seperation of personal and professional ethic is a problem (unless you are pathological) with the human psychology and the modern world. In order to make more money, gain more power etc. you are often asked to hold increasingly incongruent ethics in your personal and professional life. I believe this creates "walking timebombs" within us. It is, in my estimation, a problem. All I can say is to, as much as possible, align yourself in a field and with a company that is as congruent to your personal ethic as possible.
I, for instance, desire to help others and make the world physically better. I have found healthcare to be, while not at all perfect, mostly congruent to my goals. I do not think this is for everyone. Different people have different personal ethics.
When one is first starting out, they can't necessarily afford this luxury of congruent ethics. We are all working within a hierachy of getting our needs met and must be less picky when we need basic food and shelter, but we should be striving towards higher goals IMO- that is what keeps the human spirit fresh. So there is the matter of knowing that one may be working on long term goals, but in the short term having to accept a wider gap between personal and professional ethics. Still, there should be a bottom limit, and each person should know what it is- or be in the process of finding out by listening within until they do know. Of course, the pathological person never will know, but society generally sorts these people out in time.
This is my point really. Ethics do speak to right and wrong, but are also broader and speak to good- better- best- better than best. Ethics are part of the human process and cannot be seperated really. Our ethics must support where we are at in the process at a given time. Sure, there is some bottom point we have to draw the line. Some examples may be "don't do anything illegal unless there is a VERY VERY good reason". "Don't do anything generally considered very immoral in your society".
I would suggest that a person does not support or do things they really really hate. There is almost always another way to eat and sleep without resorting to this. By choosing to stay somewhere you real really hate you are denying yourself growth and possibility.
Don't let your personal and professional ethics get too far apart for too long or you will have problems. Only you can find where these lines are for you.
So, application to Hotspots? Personally, I would never enter the network of another person if it was clear it was unsecured and not public. For instance, I have seen Dentist and Dr. Offices locally that have their office names identified and yet, are in fact open. I don't use these.
WAPS that say "Public" or are known public (University, Coffee Shop) I will use. I will also use an unidentified WAP that appears public and does not appear to be mistakenly so, but consider all connections -including those coffee shop ones- to be at my own risk.
At one time -in an effort to catch a malicious person using my Public WAP- I put a packet capture program on the WAP connection. Imagine what I found out about the use of my WAP. There is a security question at the other side too. I would be careful that the info I was sending and my own laptop security was set with the assumption that what I was doing was public.
So, for me the professional and personal ethic is fairly congruent as far as WAP's. I would follow these guidelines either way. It helps me sleep better :)
In conclusion, I would say that not because of some perfect morality or ethical standard should we strive towards congruence in our personal and professional ethics, but because our basic health and well-being depends on it, especially over time. It is a practical reason in this case that they "carry over to one another".