No need to make a forum bot
, I think. Automatic crash report sending has been done, though. Heck, MS Windows allows you to send a crash report to them for just about anything (I don't think that anyone actually reads this stuff, though). It could send the log to an anonymous online database and give it an ID number, so that the person could just post the log ID and everyone could quickly access it.
You'll still need someone to volunteer to run a reasonably highly available server that accepts anonymous data uploads. It seems far easier to me to just have a button to access the log, and a link to pastebin (or a similar service), and a link to the forums. After all, from a selfish point of view, we want more participants on the forums anyway, right? Encourage them to create their own account

I should also note that ngld's new knossos launcher does include a button to open the log in a new window (on Linux at least, I haven't run it on Windows yet). It's not in the most obvious place, but that could be easily changed.