Not if you only set up a Tor node to be used as an internal relay within Tor network (you're doing a good job nonetheless), not as a tor exit (exit point to internet/clearnet). The latter ones are those that might get some heat. As long as it's an internal relay node only, traffic in/out is encrypted end-to-end, and I haven't heard of any problems in terms of law harassment etc.
Of course, I should have specified I was referring to exit nodes.
Without the exit nodes, the relay nodes are nothing; just a bunch of people playing hot potato with encrypted data and no one prepared to take the heat by attaching their details to it.
