I for one like the idea of such discussion threads. It was mainly faction-faction bad rivalry which somewhat derailed the GMG ID thread, but from general pov, there are a lot of cases when things aren't 100% clear, like "can GMG ask for payments in their systems" issue, or "can corrupt LPI/RFP/GRP play trade lane toll collectors". Discussions create chance for people oriented in the topic to bring up points supporting (for some controversial), yet inRP legit encounter outcomes. Aforementioned corrupt RFP trade lane toll collecting would be such issue.
Of course, such discussion threads need to be strictly moderated, and maintained in calm, constructive manner all the time, but as I said, I believe problematic persons in GMG ID thread caused trouble due to personal/faction bad rivalry, not due to the very nature of such, imo useful, threads.