Parents won't respect privacy

[Anon0998]

Now I'm not a parent and I'm not a child either. But I wanted honest advice on what to do and if my parents are in the right or if I'm right in saying they have crossed the line. So I had left home last year due to other circumstances but also due to my parents not being able to allow me freedom and constantly monitoring my social media accounts, who I was with, where I was going and simple decisions such as other life choices I made. I left home as they had essentially said the only way they would back off is if I provided for myself. I pay my own phone bill, live away from home with my partner, I am now legally an adult in every sense of the word and I have done what they have asked hoping in return I would get a little bit of respect and privacy. Yet today after visiting the house, I had left my social media open on a family laptop, I remembered I had left it open soon after leaving and asked them to not only log out but also changed my password and logged out of all devices on my phone as I did not trust them. My parents then only half an hour later proceeded to bombard me with screenshots of PRIVATE messages I had previously had with a friend saying how disgusted they were with meach discussing a substance with a friend and almost threatened me with the fact they had the printscreen. I pointed out that not only was I now an adult not living under their roof, but also I had clearly not said I was going to take the substance but my friend had asked me if and where he could get it. I also pointed out that they had yet again my privacy and that they would have not got irrate about this if they had not been snooping in the first place and how disrespectful I found it. My mum is now threatening me with a multitude of things and still attempting to blame me even though I am not ashamed of a normal private conversation I had with a friend. Am I in the wrong, or is my partner right in saying they've clearly disrespected my privacy and need to apologise for going through my messages.
P.S the conversation they printscreened was quite far down my messages so they couldn't have possibly have seen it by accident.

They have not respected your privacy but it sounds as though they have form for this. It was really silly to even log on at their house, given their past behaviour.

I think they are behaving really badly, but possibly they feel they are justified given the nature of the messages, about a "substance". They might feel they're protecting you, by coming down hard.

Just to defend that I only logged on at the house as I had left my phone at home and needed to get a message to my partner. Secondly, like I said they were snooping in the first place to be able to find those messages. And the messages clearly say that I'm not taking it. I have in the past and have been very open with them about what drugs I have taken so if anything they should be pleased that as an adult now I am making the right decision to avoid it instead of still slating me after not taking it.

You're an adult. Why are you even entertaining your parents theatrics? They have no power over you. Simply refuse to engage in their nonsense. Honestly, it's time to grow a backbone and behave like an adult.

While they haven't respected your privacy, please try and think about it from their point of view as parents.

I would be horrified if I accidentally found out that my adult son had been taking drugs. And I'd want to try to find out more about what was going on and how I could help him. Presumably that's what they are trying to do - because they are your parents and they want the best for you.

NewIdeas that would be fine if they didn't already have form for this. Doesn't sound like they really care, OP says they weren't discussing taking it.
And horrified? Is that if he'd been smoking a joint or injecting heroin?

OP they sound sad and awful, but you don't live there anymore. If this happened to me and had been happening over a number of years I would seriously consider cutting them off, they sound unhinged.

You need to take responsibility for your own actions:

For leaving your account logged in in someone else's house (always a bad idea)

For you attitude to whatever substance. Presumably your parents can only threaten you if it's illegal.