For those worried about running a relay and dealing with people abusing you as an exit node, here is a good article from Tor about minimizing abuse of your node: https://blog.torproject.org/blog/tips-running-exit-node-mini...

One tip that you should immediately be aware of is that you don't _have_ to run an exit node. You can force your relay to act only as an intermediary, in which case you almost certainly are not going to get any calls about abuse (because you won't exist in any server logs).