I spend time on the Technical Panel of a security standards body called TigerScheme[1] which is very much a project to which people contribute free time in a similar way to many open source projects (although TigerScheme isn't an open source project, as it doesn't release code). I recently used the phrase 'do-ocracy' to describe it. If you have the time, want to do it, run it past the other people and if there are no objections within a reasonable time frame, do it. Previously Tigerscheme suffered as volunteers wouldn't be available in decision making. I believe this 'do-ocracy' approach has actually enabled Tigerscheme to make decisions quicker and take better ownership of actions.