Asking an EMT or even a Paramedic what they can and can not do is very relevant to the information that is posted for the answer. No two states, no two counties or two ambulance services may have the same protocols for the EMT-B or Paramedic. Nor do they have the same equipment.
Now, even at the BLS level there comes an issue with education. One should know how their equipment works, the benefits and the compllications as well as some information about the disease process. Yes, knowing what the poster knows about the disease process is important to see what needs to be clarified further. Just "doing a skill" because you can should NOT be acceptable. Yet, you deleted every post on that thread by myself, MrBrown, daedalus and others about pathophysiology, equipment use and medications. What did you expect? A one word answer or a simple recipe? I hate to tell you but even at the "BLS" level medicine is much more than that. It is also up for debate on many levels which is why we have medical journals full of fact finding missions and those searching for more knowledge or a better way.
The ranting and disagreements came when another member believed there is no need for more than a recipe to follow consisting of blanket statements.
