On Thu, Sep 26, 2013 at 12:04:13PM -0800, I wrote:
Why not?
I've been running a middle relay for years in my private net behind one adress. no problems there. You should just never run an exit relay there.
EFF recommends against it in their Legal FAQ: "Should I run an exit relay from my home?" https://www.torproject.org/eff/tor-legal-faq
Their recommendation comes from dealing with one too many distraught relay operators who had confused DEA agents show up at their house and take everything including their toaster "because it might be evidence".
In general we've been doing pretty well at teaching law enforcement in the US about how Tor works: https://blog.torproject.org/blog/trip-report-october-fbi-conference but a) there are many other countries out there, and b) all it takes is one guy who didn't read his "there's this thing called Tor" briefing, or didn't believe it, to ruin your day/week/month.
So, feel free to do it, but also be aware there's a tiny-but-hard-to-actually-estimate chance of getting to spend a lot of time teaching people about Tor.
Thanks! --Roger