I don't say this 'cos I have a hangup about pirating software, it's simply for information. I have copies of software on floppies that I didn't buy from anybody, just as you probably have. I photocopy printed stuff all the time, but in law it's illegal.
That is not completely true.. It really depends on the country you live in. Alot of EU countries have something you call fair use, which covers the ability to copy your legally bought items as a backup.
Here it is also legal to break dvd encryption on your legally bought dvd to be able to play it on lets say linux. Same thing with the drm on music and audio cds.