I agree Searcher. Their biggest bug bear are apostates. The brazen conduct label can be used at any indication that a JW has read/heard or recieved any apostate information. It will also be easier to label someone who is not in total unity with the organization than to label them as an apostate.
As an example a JW may wish to speak to an elder about a damning email they recieved. The elder could then explain it away and give a warning not to read such things in the future as it is possible it could be viewed as brazen behaviour.