Unlike in other protocols, delegators can't be slashed. All the risk is with your bakers as only they can be slashed. Nevertheless, we advise you to carefully choose your baker. Malicious or defective bakers might lose their baking rights, so that their delegators will miss out on future rewards until they re-delegated to another baker.
Furthermore, due to the current architecture of the Tezos protocol, all the rewards earned through a baker are sent to the baker and are not automatically forwarded to the delegators. It is your bakers’ responsibility to forward the rewards to you. In case you delegate to a malicious baker, you risk losing out on your rewards.