It's a dog eat dog world. Why not go rob a liquor store?
Why not get a gun and hold up old ladies for their jewelry?
Why not?
Because you're probably the type of criminal that thinks it's cool to steal electronically and that it's somehow different than taking something directly from a person.
It's not, but whatever you think. Hopefully you won't bother calling the cops when the bigger dog comes for you, especially since it's only fair....
Equating physical, rivalrous property with IPR is an old fallacy spread by the likes of RIAA, MPAA and others...for instance, downloading music and other media content strictly for personal/family use is ABSOLUTELY legal in several civilized jurisdictions, including many European countries, Brazil and other countries (although software is normally not included in that possibility)...the same goes for many fair use cases, which would obviously not apply to a bottle of liquor or an apple in a supermarket.
So try studying a bit of law or at least knowing what a certain jurisdiction qualifies as a legal offense before calling someone who has downloaded a song a "thief" - that's why business models need to change over time, after all.
And no, I've never used Installous or any such crap; today is the first time I heard of them.