The vast majority of the people that pirate Photoshop do not need it. The people who legitimately use Photoshop use a fraction of its capabilities. Honestly, unless you're putting out a print publication, you really don't need Photoshop. You can just as easily use the Gimp to float text over a Dragonball-Z picture to post as your image signature...

Source: http://grimthing.com/archives/2007/01/11/Gimp_vs_Photoshop/