Church membership is a hot topic today. If you want to make people mad, then tell them they need to be a member of a local church (by local, I mean not the 'global' church). I recently had a conversation with a woman who said that she worships at home by herself. She said that she found the people in the church to be hypocrites, socialites, and liars. I agree that churches are full of those types. We all know people who come to church for the wrong reasons (admit it - you are thinking of some examples as you read this, arent you?). There will always be people who come to church for social reasons or to 'be seen' by the community. There will always be people who come to church only on Easter and Christmas Eve. There will always be people who gripe about everything that happens (good or bad) in the church. There is no such thing as a perfect church or perfect church family on this earth.
The church is known as the 'body' of Christ. When we are saved, we become part of that body. Each part of the body (each member) has a gift or talent -- something they are called to do. When a member of the body (a saved person) cuts themself off from the body by "forsaking the assembling", they become disconnected and cause the body not to function properly. When we receive salvation, we also receive responsibility in the body of Christ. Like the heart, lungs, liver, etc, we each have a job to do and when we lay down on the job, the body of Christ does not function at 100%. In other words, we cannot accomplish God's purpose by sitting on our couch watching Joel Osteen (see funny by Jennifer).
People get so frustrated when they try to do or be something in the church that they were not created to do. We also get frustrated with others who do not do what they are supposed to. When we don't do what God called us to in the church, we are a drain on the body of Christ. When we don't pull our weight in the body, we put a strain on the other members (our brothers and sisters) and we cause the body to be unhealthy. I think it is better to find your gift and place in the body and work well in that area. Rather than trying to do a thousand things "half-way", it is better to do what you are called to do well.
We were born-again into a family with billions of siblings, yet that does not mean that the responsibility of God's purpose does not fall on us. We are called to participate in fulfilling God's purposes. God has allowed us to be a part of a local group of believers so that together we can accomplish tasks for His Kingdom. There are believers who live in remote areas of the world who may be forced to worship alone, but for most of us we are blessed to be near a local church where we can worship and serve God with our brothers and sisters in Christ. God never called us to be loner-Christians, so sitting on the couch just wont do.