Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Some background - 17 year old guy, biological parents divorced when I was at least 5 and I went to live with my mom. In court it was determined that my biological father (will refer to him as biodad, reasons later) would be the one to pay alimony if anyone was going to, but my mom, being the kind person she is, decided to let it slide. I would see him every once in a while but I lived with mom.
Fast forward to 6 or 7 years ago when I was 11 or so, my mom remarries to my stepdad (whom I refer to as dad, hence confusion with titles) and we move in with him and his two children. His wife/their mom passed away many years before. From here on out the visits with biodad become even fewer and further between, essentially being holidays and 3-day weekends.
Another fast forward to this past year or so. My dad and I have agreed (with mom's consent) that my relationship with biodad has zero benefit to our family, and that we should slowly start reducing the number of times I see him. He has tried to poison my beliefs with his, which are essentially that HE agreed not to pay HER alimony, and that HE was the one that made sure they separated peacefully. All not true, obviously. And also, he decided to smoke weed in front of me on several occasions and every time we would go visit it was at his convenience and so he would have to do as little work as possible, and when I was there he was working so I was chilling at his (my grandparents, his parents', I should add) house. If I'm gonna chill I can chill at my house. He lives 2 and a half hours away in Delaware.
We start cutting him out pretty well and make some good excuses, and he buys it for the most part. This goes on for a bit until the beginning of December. What he does before a holiday is essentially pester the fuck out of me with texts like "Hey got any dates for our visit yet?" Or "Hey do you know when you can come down?" And it got to the point where I was sick of it.
My parents and I carefully crafted a response that used legitimate excuses (stretching them a bit) to say "I can't come to you, but maybe you can come here and we can go out to dinner" and he doesn't buy it.
15 or so minutes later I get a response - "I don't think so. Maybe next year. Merry Christmas." Then - "Don't bother responding that's bullshit and you know it" and "take care" and my parents and I are just kinda meh about it. Another 15 min and I get two more: "btw lose my number" and "asshole".
Then he texted my dad. He essentially said "hey I don't think I can trust [mans_best_comrade] tonight can you keep an eye on him? We were arguing and I just laid him out" which was so manipulative I had to laugh.
They called the next day and my dad essentially listened to him scream about what an ungrateful, condescending asshole I am. That's all that was.
So here we are, and he hasn't said a word to me since the "asshole" text. However, I've been using his Netflix account for years since he offered it to me, and I just thought about the fact that he probably doesn't know I'm using it without his permission. Is this a dick move or is it alright given the circumstances? (Keep in mind I'm fairly certain I'm NTA with the texting situation, I'm asking about the Netflix deal) 
Really sorry it's so long it's just a lot of background!!! Thank you!!
TL;DR toxic Biological father called bullshit on excuse to not see him, is now pretending I don't exist to teach me a lesson, but I'm using his Netflix without him knowing.

using my biological father's Netflix account without him knowing while he ignores the fact that I exist