You want to know why artists get pissed off that you use their work without permission? Because we work hard on them and the amount of designing that went into it, and its completely unfair, not to mention RUDE and completely disrespectful to use it without permission. It takes a lack of COMMON DECENCY to do something like this. 

The issue is not a simple as you using it, it’s about not getting permission and not giving them credit for doing so. Which a lot of of you do. Personally, when someone does to me, it makes me feel like you are STEALING my work....