Will the police try and arrest you if they know you are going to commit sucide?
currently if they have enough substantial evidence they can. otherwise our laws are mostly based on reaction, not proaction.
personally, i prefer it this way. proactive legislation tends to turn towards morals, such as what one should do, versus if someone is actually harming another person’s body or property. no matter the quality of proactive criminalistics, there will always be criminals. the money and effort that would be required to prevent a good portion of these people from commiting their crimes would be far above and beyond the damage they would cause and the following, reactive, judicial processes.