I've been reading Macarthur's 'Ashamed of the Gospel' where he describes Spurgeon's one-against-the-world stance in the 'downgrade controversy'.
Admittedly, Spurgeon wasn't working within a local body, but within an association of churches, but I've been wondering:
How do you fulfill Matthew 18 if you're the ONLY person who sees the problem? What do you do if nobody will go with you to establish the conversation? What do you do if nobody accepts your premises?
Do you just walk away, shaking the dust off your feet? Or do you stay until you have gained a sympathetic ally?
(Which, of course, would look dangerously similar to sowing discord...)