Keep in mind that when you run as a relay - even without being an exit node - your IP and assigned nick is published in real time, and permanent records are kept of it. The permanent records or for the 'ExoneraTor project, so if you are running as an exit and someone does something nasty, they can prove that you were running as an exit at that time, and the protocols you allowed to exit, protecting you somewhat from legal implications.Current list of relays is here:https://metrics.torproject.org/networkstatus.htmlExoneraTor can further find out whether this relay permitted exiting to a given server and/or TCP port. ExoneraTor learns about these facts from parsing the public relay lists and relay descriptors that are collected from the Tor directory authorities. The ExoneraTor info is here:https://metrics.torproject.org/exonerator.htmlAs well, you can search to see if an IP, fingerprint or nick was ever used as a relay at any given time with the Metrics Portal Relay Search, located here:https://metrics.torproject.org/relay-search.htmlRunning Tor as a client leaves no trace and no one can tell you are, or were running a Tor client. As soon as you start running as a relay, you lose that anonymity, and leave a permanent record of your Tor relay history, including start and stop times, and exit policies if applicable.Just a few things to keep in mind.