You suggested pears before you even knew what state he was in, let alone in which of the 5 zones that are within Wisconsin he was asking about.
And yeah, it is up to the poster to furnish location info if they wish, but it's also a responsibility (or should be) for someone (as "knowledgeable" as you) to know the general location before they start giving advice. For all you knew, the OP lived in a zone not suitable for pears...in which he could have spent hundreds of dollars buying pear trees based on advice you gave him. I know that "posting of location" was a topic in another thread and you seem opposed to it...at least that's how it appears to some of us, but apparently you don't care about the hardiness zone location of someone asking advice. But you should ask a few questions before giving advice IMHO.
I seldom give advice to guys in south Florida or Texas, because I have no experience in those zones. I think we should all consider how much we may or may not know before we give advice because there are newbies on here that are quite wet behind the ears when it comes to this stuff and they may take some unfounded advice. We really need to realize that when we give advice and use all the acronyms, abbreviations, and assumptions we use about what we think they know.