How do I get away from my verbally/mentally, used to be physically, abusive father?

Call WA DCYF: https://www.dcyf.wa.gov/safety/report-abuse. At 16 you can petition a court for emancipation.

My friend is in a sticky situation. Is this abuse?

You can report it to the DCYF: https://www.dcyf.wa.gov/safety/report-abuse. They can investigate.

Do I need a parent with me at court? I'm 16.

Business owners usually have the right to refuse service to anybody. What you need is an attorney.

Can a 16yr and 13yr refuse to see their dad?

Follow any court-ordered parenting plan. If you don't have a court-ordered parenting plan, get one. If you don't like your court-ordered...

I am the biological mother my son and I will never speak again he is 24 years old and I want my name to have nothing to do with?

You can change your name: https://www.kingcounty.gov/courts/district-court/name-changes.aspx. You can also make a Last Will & Testament leaving...

Is it likely I will be paid more than 45% of my kid's dads income in child support?

See RCW 26.19 (https://app.leg.wa.gov/RCW/default.aspx?cite=26.19). Fill in the forms: http://www.courts.wa.gov/forms/

Why was I the only 1 charged with possession?

Police and prosecutors bring their actions based on probable cause. Maybe one or more of the other passengers made a deal for immunity in exchange...

Can I take pictures on a closed road?

The "blockade structures like saw horses" are probably there for a reason.

Arrested on failure to appear?

It's important for offenders to comply the terms of court orders (i.e. updating contact information pursuant to a community custody order, etc.)

See RCW 26.26.100 (https://app.leg.wa.gov/RCW/default.aspx?cite=26.26A.100). The foremost consideration in family law questions is the best...