Here's my thoughts on the matter, and I hope that I do not offend anyone.
First, I will state outright that I do not use any software anymore aside from a freeware audio editor that I use for recording my hardware. That said, I used a LOT of pirated software in the past. In fact, I've never actually paid for anything in terms of audio software, and I had basically everything there was to get... more stuff than I could possibly get around to using, much less fully appreciating. ("Less is more" definitely applies to ITB production as well as hardware-based production!)
I know that pirating software is not ethically justifiable (from a strictly philosphical perspective), but the reality of the situation is that even if I COULD have afforded to purchase the software that I frequently used back then, I never would have. I've never made a lot of money and what money that I did have was going to go towards tangible things, like hardware or basic household items, living expenses, etc. Even if I had some free money kicking around, I'd never spend money on something that I know that I can get for free, especially when it is utterly indistinguishable from the 'real thing' and the odds of getting into any sort of trouble whatsoever are slim to none.
Sure, some of these bootlegs were infected, but that is easily sidestepped with a little knowledge. Also, there are soooo many bits of software that I obtained that I feel were very, very overpriced. (Waves, I'm looking at you!) If I paid full retail price for them, I would have been a bit pissed off. I fully believe in "try before you buy," but I also believe that there's no harm in downloading and using bootlegged software if you don't realistically have the money to buy it to begin with... What I mean by this is imagine that there's some 15 year-old kid who lives at home with his parents. He wants to make music and has watched tutorials about FL Studio via YouTube. For most kids that age, the price of that program would be a small fortune (even possibly unobtainable), and even if they managed to save up that kind of cash, odds are that there's things that they want/need more than a piece of software, so the likelihood of them actually buying it are slim... therefore, what is the harm in downloading and using a bootlegged version when you're not taking money out of the developer's pockets, especially if you do not 'seed' these warez, spread them around, or somehow profit from them?
I personally feel the same way about music, movies, and basically any sort of intangible digital goods. If I plan on buying something, I'll buy it, but just because I do not plan on ever buying a certain thing, does that mean that I should disallow myself from obtaining said thing just to see if it's good or not? There's no physical loss, nor is there any loss of revenue going on... For example, if I wanted to listen to a Justin Beiber album just to see how terrible it might be, and I download a copy of it, am I wrong for doing this even though I would never pay for it to begin with? Also, for that matter, where do we draw the line? There's an insane amount of copyrighted music shared on YouTube, so if you listen to a song from there, aren't you just as guilty as downloading something? Or does streaming not count?
I think that using pirated software is a bit of an issue if you can comfortably afford to purchase it, and you use it all of the time (especially for profit), yet you refuse to pay for it. However, on the same token, I can't blame someone for NOT spending money on something when they can get it for free. I personally think that paying for software is stupid 99% of the time, but that is just my personal opinion. I know all of the arguments pro and con here, and I know that piracy is not ethically justifiable, but I am no moral exemplar and I see piracy as a victimless crime when the overwhelming majority of stuff that I downloaded in the past was/is stuff that I'd never pay for in the first place. Digital goods are NOT the same as tangible, physical goods. Stealing a tangible, physical item is more morally reprehensible than 'stealing' a digital good, IMHO.