One thing for sure, nothing attracts attention quite like trying to conceal yourself from the cops. If you filter hard past rows of traffic then pull in as soon as you see a traffic car, chances are they've seen you already and now they're wondering why you're hiding from them... Not so much a police thing, that's just headology, if you want to make anything interesting, hide it. If you want people to think you're doing nothing wrong, act like you're doing nothing wrong.
If this approach leaves you in prison, belonging to the man with the most cigarettes, don't blame me