I agree about rioting and looting not necessarily being the right way to go. Unfortunately, over the past decade peaceful protests have been met with pepperspray and more death. Do you remember Occupy Berkely? Do you remember reading about how many pregnant women were beaten by the cops and how many people nearly lost their lives? If peaceful protest and signing petitions, that are only going to be used as toilet paper before it gets to where it needs to go, doesn't work how SHOULD the people react to a militarized police force that kills innocent civilians? What if your child was next? How would you react? Picket lines and sit ins that just get broken up with night sticks and pepperspray? The people have run out of peaceful and respectful options for expressing their grievances.
I see what you are saying, but still the point remains; torching a CVS and looting stores isn't going to solve the issue of police brutality. Thats what really bothers me, the people who use these kinds of incidents as an excuse to spread violence and disruption. And even the mother of Freddie Gray was these people are doing is completely wrong, and it was her son.