Spying on people is a violation of plenty of amendments. Illegal immigration is a misdemeanor not a felony. Stop treating the law as a binary illegal or not. It just leads to brain dead interpretations of the law. There is plenty of “illegal” things people do every day and yet we don’t install public dragnet cameras to stop it. Illegal immigration hasn’t shown any real harm to people that regular citizens don’t also take part in. Immigration has just been used to rile you up because you can scream “illegal illegal illegal” a bunch of times without reading the 14th amendment and understand that you can’t have a country of rights if you don’t extend those rights to non-citizens within your borders.