Any private interactions, from the hallway to email/irc to phone calls, are a risk to the project. At the minimum, you must be mindful of reporting back the results of direct conversation.

However, this isn't really good enough. A summary of a meeting never shows the reasoned discussion, effectively cutting the community out of the decision making process.

Implementation needed

There is a reason mailing lists and open chat networks are the baseline for all communication in successful open source projects.

Example needed