He's making an (IMO, bad) analogy to physical property. His point,
however, is a good one: you do not have the privilege of "trying out"
software at will, regardless of how much to the benefit of the author it
may end up being. You may especially not break laws (copyright, in this
case) to "try out" a product, whether that product is a piece of
software or your television. The only[0] time you're free to "try out" a
piece of software is when it is specifically offered for trial, and in
that case once your trial license expires you are no longer permitted to
use the software.
Furthermore, the original poster (just to keep this on-topic) *has* used
his trial licenses for a number of aural user agents, which have expired.
Suggesting he crack them is pretty sleazy of you. You said that you
"respect also the programmers and the law", but if you truly did, you
would ask the developers if you could try out their products, and then
respect their decisions on the matter, rather than simply helping yourself.
If you feel this state of affairs is somehow unfair, I encourage you to
find like-minded individuals and lobby for a change in laws. I don't; I
feel the current software licensing laws are broken in entirely different
ways, but "you can't use a product you haven't paid for" is pretty
intuitively correct in our society.
[0] Excusing free (as in libre) or free (as in gratis) software from the
debate, for the moment.
)