Is it safe to act as a Tor exit node?

Question

Tor

Suppose that some person decides to post illegal information or download it, and traffic will go through my node. That is, in fact, for the state - it was requests from my IP and they will come to me first. Am I somehow protected from such cases?
I also wanted to ask if I'm just a client of the Tor network, for example, opened the Tor Browser, then am I a full member of the network that can act as an exit node? And if so, is it possible to disable this transit traffic. Thank you.