On the other hand, people who naturally have a right to be suspicious of these groups, because of what they've done, might question whether they are just inviting you in for their own purposes.
They don't invite me. I go gatecrashing all the time. Evangelism, by nature, always has to be aggressive. We have deviated from that whole concept of Acts 1:8, and we've reversed the roles and say, "Well, they've got to invite us." No way. Jesus says blessed are the peacemakers. Where do peacemakers go?
CT titles the interview "Gatecrashing for Jesus." If we Christians read more Brother Andrew maybe we'd be a little less timid.