Here is the site, including a section on "am I doing business": https://www.portlandoregon.gov/revenue/59484

What you need is a business attorney, and you are wrong to think that a CPA would not be an enormous help. Don't think of this as an expense; think...

What you are thinking of is "nuisance". Light is not a form of trespass. This argument is going nowhere with legal assistance.

A cease and desist letter not written by a lawyer is another piece of paper. A cease and desist letter that does not contain a draft of a lawsuit...

Defamation is about the lamest cause of action in my view. I know other lawyers have different opinions. Trade libel is much more effective than...

Everything you say makes "business" sense, but makes no legal difference. Unless there is an egregious breach of the bylaws or blatant...

Yes, your employer can use language like you describe. If you belong to a union, you may want to raise the issue there.

Consider contacting the American Civil Liberty Union (ACLU.org)

What an unbelievably big question. To start, it will depend if the site is targeted at minors or adults. One element will be "Terms of Use"....

Pretty vague. Could be "conversion". Depending on what they want you to do, could be other things.