You have probably set the collission wrong. Go to the database, go to tilesets find the tile you are using for your wall and click on it until it shows an x. I might be wrong since i´m using mv instead of mz, but im pretty sure this is the same across the two versions.
One uncomfortable truth that has withstood the test of time, is how most people will stand by while they see a crime happening, unless it's illegal to stand by. We probably wouldn't have stories about "special heroes" or games about heroes if the "everyday common folk" were largely capable of being heroes. Heroes face dangers that most people are not willing to.
I'm having toooo much fun designing the new MP (Mental Psyche) system. I've only worked it out for enemies so far, but it's fun to stun them, then go after their MP and delete them instead to farm for better item drops.