I still believe in and support church discipline. It should be exercised for such offenses as heresy, sexual immorality, substance abuse, certain financial misdeeds, physical and emotional abuse of spouse, family member or fellow church member, etc. Exclusion from membership should be carried out as a last resort for those who are unrepentant.
When a church excludes a member, it may appropriate for that church to notify other churches, especially the new church where the member applies for membership, of the action taken, and why. It is then appropriate and wise for the new church to examine the situation, and they may accept the applicant for membership if they find that the charges against him at the previous church were unfounded.
In the case of Mr. Zima at St. Andrews, he does not appear to be accused of any offenses that would normally be regarded as sin or requiring excommunication. "Gossip" is a rather vague offense that can be used as a weapon against almost anybody. Sometimes wives who appeal to the church for help, with a husband who is into physical abuse or porno, are accused of "gossip" and are disciplined, while the hubby goes scot free.
All too many people are being "disciplined" in churches these days for offenses no worse than questioning a budget or building program, or a change in the by-laws, or for expressing some disagreement with the pastor or getting on his "Enemies List" for whatever reason. Churches that misuse the practice of church discipline, like St. Andrews is doing, bring the whole concept into disrepute. As a result, some churches go to the opposite extreme and fail to exercise church discipline and then "anything goes."
We need to find a balance, involving both compassion and firmness for stubborn wrong-doers in the church. People are going to be turned off by churches that allow rampant sin in the membership, and likewise they will be turned off by churches that harshly demonize and persecute people over the slightest offense. St. Andrews appears to fall in the second category, and in my opinion, this type of thing is a bad testimony that scares people off from church membership and involvement in general.