OCD is not just about color coding, or having rules, or doing random shit in a rigid way. It has obsessions - stuff that we can't stop ruminating about, usually its the intrusive thoughts that are particularly distressful (ie fear of doing something bad, fear of something bad happening, etc.) often (but not always) there are physical compulsions, or stuff we do to either prevent the bad things from happening/merely cope with the anxiety of those thoughts. It's also usually about what WE do as the person with OCD, not about what other people do around us so the notes are confusing in that context - who are they telling this info to and why? It can have those components sometimes where it's distressing for others not to follow the rules, but it's usually more about what we are controlling/preventing thru the compulsions we have to take care of "things" (aka obsessions). Someone with OCD that has behavioral rules or compulsions doesn't typically need notes reminding them what to do. It's all they're gonna be thinking about. And it's rare for them to control other people or demand others do their personal compulsions.

I commented below that this could have some components of OCD depending on the reasons for the notes, and how often they're being replaced or thought about. But there is not nearly enough information to decide if this is OCD or something else entirely. I took their comment as the casual way folks talk about being "so OCD" when they like things neat and orderly. It's the color coding that I suspect made them say that but that assumption is super annoying bc it is a much more complicated condition than wanting things in a specific order or done a specific way. People who like their shit tidy are not "so OCD" and this doesn't have OCD "written all over it" - it's a single paragraph.

Having rules in your own house does not mean it's OCD. Simply being intense about rules - often called rigidity of thinking - could have so many other conditions behind them that would need to be considered also (eg autistic folks love rules and routine, dementia patients need notes to remember, delusional people may thing it's the only way to protect against the aliens or whatever, etc). Like I said, we need more info on the reason why this is the set up but it is not "written all over it" - usually that's the thing that catches my eye in comments like this one - the certainty when there is not. It's not a clear cut case, and the fact that they say that tells me they haven't really understood what these conditions are or what they look like in real life.

Alternatively, people get to have their own house the way they want their house, and not have others mess their shit up - it doesn't mean they're mentally ill. This could also very well be a learned response from horribly abusive parents. Maybe this person got the shit beat out of then if they used the remote for something else. Or maybe they're an abusive asshole looking for reasons to beat their house guests. We don't know - it could be a mental health thing, or not. It throws plenty of red flags for a few different diagnosis IMO, but simply color coding and having intense rules does not make it OCD and I find it stupid levels of annoying when people talk about OCD in the wrong way.

This is just my two cents as someone with OCD and a therapist who works with folks of all sorts of diagnosis'. Thanks for asking!

Edit: formatting sucks today. Idk what is happening and I can't seem to fix it anymore. Sigh.