I don't know what the comics community could do to make everyone feel welcome; I'm cynical and unsure if everyone can feel welcome, simply because so many people have conflicting ideas of what is welcoming, but I think that calling out creators and comic industry people who have harassed people and/or been abusive is a good first step. If we create a culture where those kinds of actions can no-longer go unchecked, then more people may feel welcome to participate and know that they will be heard if they experience unfairness.