I would consider the seizure of your house while it is on fire to be very reasonable. It's not just a threat to your home, it's a threat to surrounding homes and other people. Its also very reasonable that you be detained to prevent you from putting yourself and others at risk.
I staunchly support all rights. The key word in the 4th is unreasonable. Do you consider it unreasonable for you to be detained after committing a victim crime?
Edit to add: I absolutely oppose unreasonable searches and or seizures. If there is not reasonable suspicion supported by evidence that a crime has been committed or that there is an immediate threat to life, then there should be no search or seizure. Take most minir drug busts for example. (Note: I am all for legalizing drugs. You have the right to be stupid and harm yourself. As long as you dont harm others, I don't care what you do.) Unless the cop can SEE the evidence, it's an unreasonable search.