Having sat there and considered significantly the longterm utility of logs and access to information that Bitcoin requires to defend itself—literally transparency is one of its best and most-resulted-in-rescues defences—I would like to also recommend that you make the archival and thus witnessing something that more than one person or process can perform.
On IRC, people can create and maintain logs longer-term on a per-person basis. This creates a much more robust and participation-based consensus on what constitutes the historical record.
I have found that this is an important facet of archival effectiveness as well. There are on occasion some attacker-injection problems that can be a problem for the safety of individuals, but I have also found that the most diligent and reliable sources of archival information are also the most reasonable and realistically practical people as well—so this tends to be an addressable problem.
Thus, may I suggest that the archival process itself be made available to individuals who are interested in participating. 
Further, now that I’m thinking about it, I would like to point out that for those forums like Slack where the relevant historical archive is spotty, questionable, inaccessible, or otherwise opaque, these places are the sources of significant and ongoing attacker fuel—a simple propaganda-only example would be the ongoing nonsense about the “dragon’s den.”