Having been to your church in Northern Virginia, I think you are right on in some people wanting to remain anonymous.

In terms of getting contact information, Yvon shares some great ideas in a radio interview I did with her:

http://www.evangelismcoach.org/2009/how-to-get-church-visitor-contact-information/

It might seem a little challenging on the administrative end to implement, yet it seems to be a very effective idea.

Passive:
Small brochure in the pew where most of us keep envelopes and such. It’s a half sheet of 8.5 x 11 trifold. Simple thank you for being our guest (not visitor) with some program times and full contact information of the staff and office, and a form to fill out to submit their info. It’s important to make sure that the info on the back of the part you want them to give you is not something they might want to take with them.

Active:
Fellowship Pads- everyone signs. Really a poor tool for data collection due to the layout. I am redesigning ours so that we can get the info we need. We know who is a member and not, we need space for the real stuff like name, address, phone, and most importantly email.

Pastor Info card at the door. We only have one real way of the worship service and I am posted their each week. I ask the simple question if they left their info with us in the fellowship pad. If so I talk for a brief moment and try and pass them along to the other critical aspect of our collection. if not I ask them if they would be willing to step to the side right by me and fill out a small card with their information we need. Few say no.

Finally, it is critical for our members to talk to them and get the goods on them. I have people who try and get real life info from them on family, work and home.

Each monday the Elders and Deacons recieve a list of those folks and usally someone can give me more info on them. It helps with my follow up because I can talior it to them. Make it personal.

The missing part for us is how do members follow up? I read so much that puts the emphasis on memebers doing the follow up. That’s why we are going to do some realy work on helping folks get comfortable in their Christian Skin. So they can talk to strangers with confidence.