Mark Roberts is doing a series called What is a Church? Biblical Basics for Christian Community. I especially like the four posts he's written so far under the title "When a Church is not a Church?" These look at the Greek word usually translated as "church" in the New Testament, 'ekklesia', which means "assembly" or "gathering" (and not "called out ones", as many erroneously claim because of some bad arguments from etymology).
The fourth post in that series within the series raises a point very much worth emphasizing. It makes no sense to say that you're part of a gathering that you don't show up for. In a sense any Christian is a member of the gathering around the throne of God in heaven, but we also speak of ourselves as members of local congregations. The average congregation has about 60-70% of its membership regularly attending. Does it make sense to call the others members of a gathering that they don't ever gather with? Treating a church like an organization with a membership list does have this particularly unfortunate consequence, even if there are legal reasons (and perhaps other reasons) to do so.
There's lots of other good stuff in Mark's series, but that struck me as a pointed observation about this attitude about what the church is among a large enough population in contemporary evangelicalism.