Anyone that has to travel via public airlines, has as a part of that travel, to deal with security elements of airports, to which virtually all major airports in America, use the Transportation Security Administration (TSA), and their primary duty is to make sure that at airports, cargo, along with its associated personnel and passengers, comply with all TSA regulations. Of course, it isn't real clear that the TSA even understands their own regulations, as mission creep seems to be part and parcel of virtually any Federal agency created, and is certainly the case for the TSA.
Take for instance, the fact that airports now have TSA canine (K-9) units, which upon the first time that you see one, takes you somewhat aback. Typically, most people associate K-9 units with actual police officers, to which TSA "officers" most certainly are not, which begs the question, if TSA agents are not police officers, why are they, as opposed to actual police officers, utilizing canines on behalf of their duties?
The answer given by the government would typically fall under that the canines are being utilized by the TSA to detect for explosives which is one of the most significant reasons for the TSA to exist in the first place. If this is truly the case, though, this type of work seems beyond the scope of TSA agents, as a "positive" from a canine, would seem to necessitate taking actual action against a person or persons, to which having the legal ability to arrest, be armed, and a good understanding of Constitutional safeguards, all seem prudent for exactly this type of situation, because the fact of the matter is that most "positives" are not going to be real, actionable events at all and thereby need to be handled by those that have both the experienced and the training to deal with these situations in such a manner so as to not unwittingly upset the citizens that are supposed to be protected, but not unduly harassed without probable cause.
Another issue with TSA K-9 units is that the policy of where these units are deployed seems haphazard and logically inept. For instance, there are security lines to enter into the actual airport terminal to which all personnel and passengers are subject to these lines in one form or another, but somehow you will find TSA K-9 units on the other side of the security window, that is to say, in the passenger debarkation and embarkation areas to which they will roam about, which begs the question, if you are going to have TSA K-9 dogs after passengers have already gone through security, what is the point of the security lines to begin with?
That is to say, once you decide that TSA K-9 units can go anywhere, than why not on the airplanes themselves before they take off, or while passengers are in the runway to board the airplane, or in the bathrooms, or the smoking rooms, or on the tarmac, or in the parking lot, or in the parking lots of facilities that are for longer term parking but are off premises, or at passenger's houses just before they get into their car.
The bottom line is that TSA K-9 units are completely ineffective, all flash, no substance, a waste of the taxpayer's money and a disgrace to the principles of this great nation.