In some states both using fake IDs and using someone else's ID are felonies, as is tampering with your actual ID. Additionally, if you are using a fake ID to do underage drinking you are committing additional crimes. If you get caught, you will have a criminal record, which will come up either in the admissions process, or in subsequent licensing background checks. Doesn't seem worth it to me, even if the likelihood of getting caught is remote. But to each his own.