Two perspectives of boundary:

+ what you would not do

+ what you would not allow others to do to you

Thankfully, my boundary of never floating off into space without a protective suit and oxygen is being helped by gravity.

So, if it is something that YOU WOULD NOT DO, you simply choose, over and over and over again, ad infinitum, to not do it.

OTOH, if it is something you will not allow someone to do TO YOU...

It actually is up to you to make yourself unavailable to have it done to you.

If you choose to no longer be abused by someone, you need to remove yourself from that person.

If you choose to not meet OW, then you need to NOT meet OW.

I do know the argument then goes around to stating the boundary and further, that we have laws...

The thing is, I have a personal boundary that I will never be murdered. Unfortunately, a law will only uphold the conviction of someone who murdered me. It will not prevent me from being murdered.

Yes, that may sound like a ridiculous argument. Yet... it is what it is...

One can play the "bigger gun" game.

Or, one can simply be responsible for their own boundary and how to creatively enforce it.