Your right, it can help in the way you stated above. But still, I think we need to focus on more long term solutions to this problem, such as pushing for much harsher punishments for bullying for any reason. While many schools have implemented zero tolerance policies, many have not. A lot of places, all they get is a slap on the wrist and thats it. This whole purple thing may draw a lot of attention for this one day, but once this one day has passed, it gets pushed to the back of everyone's mind. More permanent solutions, like I mentioned above, don't go away after one day, and people realize that they can't do that without a serious risk of punishment. People learn through punishment. If a person sees he can get away with it with little or no fear of punishment, they will continue to do it. If they have the fear of God struck in them, and they know that they could face harsh punishment, they will probably think twice.
We should be focusing our efforts on pressuring school boards around the country to adopt strict zero tolerance policies and have harsh penalties for those who bully. That is a sustainable, long term solution to this problem. Not wearing purple, but thats just me. I encourage everyone to go to school board meetings and bring this subject up. Tell them that this is urgent and something drastic needs to be done about it quickly.