Re Portland: this is factually inaccurate. Uber admitted they used Greyball when they were operating illegally in Portland. Yes, Portland & Uber have since come to an agreement, but not even Uber claims they were operating legally when they used Greyball to evade law enforcement..
Kindly, the challenge with explaining this to non-lawyers is that you do not know what you do not know, but think you do, & use words differently than an officer of a court does.
The example of a process-server is simply not a relevant comparison. Proccess-serving has a lot of TV-created urban legendry around it. Yes, you can try to avoid being served & but, no, you can't ignore a court order or a subpoena by avoiding a process server. If you try to hide, they'll eventually just mail the summons to you.
Regardless, process-serving has nothing to do with what Uber already admitted to doing: building & using software in CA to evade law enforcement in, eg Portland, which is a jurisdictions where they knew they were operating illegally. This is obstruction of justice.