Can Copyright Holders Find Out Who I Am and Sue Me?

Yes.

A past example at MSU proved that the Recording Industry Association of America (RIAA) is actively pursuing copyright infringement. The university received a group of "Pre-settlement Letters" in 2007.

MSU provided a copy of the pre-litigation letters directly to the students whose IP addresses were identified by RIAA as allegedly engaging in copyright law violations. These letters delivered a clear message that it was RIAA's intent to file a federal lawsuit within 30 days against the students, which would include RIAA's legal right to learn the students' identities through court order.

The RIAA went on to file a "John Doe" lawsuit concerning MSU IP addresses to identify the infringing students who did not settle their case. The court issued subpoenas for student identities. The University only provides student information to outside entities when legally required.