You may only THINK you are doing nothing illegal, the Police KNOW they are 'the thin blue line defending society from the depredations of everybody else out there' (A legendary quote reported from one Qld Police Cadet Graduation Ceremony!).
A good idea, as long as 'cooperating' does not lead to you being seen as 'confessing'.
I used to be like you, then got dragged into some nasty things while naively 'cooperating', now not so sure I trust Police, even my own family, especially as I have been lied to my face many times by Police...
Donuel is an American, other countries do not have 'Miranda' but do have similar protections, for the moment.
Anybody read Judge Dread lately?
"What am I doing wrong?"
"You're breathing heavily citizen, that's evidence of guilt, so you MUST have broken the Law! I find you guilty! Penalty Death!"