I did that. Then they got a federal search warrant by making up a dog that supposedly smelled something, said there must be drugs hidden in my GI tract, dragged me to the hospital and then sent me the hospital bill when nothing was found. You can stop answering questions and they keep dragging you to more hospitals racking up your debt. This whole time I was 'not under arrest' so I had no real rights, but apparently DHS can drag you to hospitals cuffed for 'emergency medical care' without an arrest.

On another occasion feds came to my house to investigate a neighbor. When I refused to talk they waited until I was shutting the door and stuck their fingers in to try and get me for assault as it closed. Thankfully I caught the door at the last millisecond and just stared at them blankly with the door cracked until they left.