Garry, don't get me wrong I am not condoning or defending these blokes actions, BUT for exactly the same reason why fishos in boats don't wait for you to finish fishing before they anchor 10m from you. Most people just don't give a flying #*#* about anyone else.
We've all had a number of inconsiderates pull up in our discomfort zone which is annoying and frustrating but I for one certainly don't wish to drive hooks in to them or wish they were devoured by sharks.
Craig