With the exception of a few court proceedings that are not open to the public (some states, such as the one where I reside (Utah) do not open juvenile court or adoption proceedings to the public, but virtually all other criminal and civil proceedings are open to the public), yes, anyone can walk in to the courtroom and observe public proceedings. The reasons for this are that judges are public servants, the courts are funded by taxpayer dollars, and the administration of justice is a public good that members of the public has a right to oversee. May it ever be so.
Utah Family Law, LC | divorceutah.com | 801-466-9277