trying to prevent genuine Amiga hardware users from being able to obtain easily some very old software that no-one who allegedly owns it could care less about... 
At least I personally have absolutely no problem with someone downloading a Workbench disk ADF to replace a dead one. In my view they can consider the download as being a "remote backup" of their original disk.
I don't fit your description though. I have two amigas at home and I do use the A500 occasionally.
Cloanto, despite not being the copyright holders are the only party guilty of preventing this 20 odd year old software from being made easily and legally available to those who still wish to obtain it... 
They're both obliged to take action (see
http://www.amigaforever.com/kb/13-122: "When we receive reports about web sites which are claimed to provide such files, we are obliged by law and by contract to take some action.") and it's sensible course of action to protect their investment.
I can carry on quietly with my original intention of getting to the bottom of all this
Good luck with this endeavour. I hope you'll use less controversial methods in the future though.