The framing in this conversation is important. This is difficult, but making it clear you'd rather not see that is how I'd go.

I'd tell them that I noticed I could clearly see the furnature, wall, or some detail and would rather not see them indecent.

No way around it, it's going to be a bit awkward, but telling them shouldn't seem like a weird thing to do. If you're polite, telling them about the issue is a kind thing to do.

Maybe a note outside their door? Could be anonymous if you don't know them well and they don't have cameras, saves both you and them the awkwardness

I'd drop a note, to avoid the awkward conversation that might happen & to avoid embarrassing your neighbour.

Just tell them. If that was me I’d wanna know ASAP!

Go there, ring the bell, tell them. The longer you wait the creepier that conversation is going to be.

“They did a really neat job with your appendix scar”

I have no idea what to do about the not-so-frosty windows, but regarding your bonus question, that's just lemmy being laggy. Next time you refresh you'll see that you're subscribed. I had the same question yesterday and saw it being answered somewhere.

Send them a dick pick of their own dick. that glass will be frosty the next time you see it.

You’re going to have to post a few pictures for us to better asses the situation 🤣

Invite him over while she is taking a shower. Enjoy the view together. Let them draw their own conclusions.

Send them this article, and flee the country. 0 interactions.

We need photo evidence to verify your claims.

just tell them asap. idk who tf thought it'd be a good idea to put windows in a bathroom.

Bring up this issue happening with you, in casual conversation. For example: "when I moved here the house had a lot of issues, for example [...] and the glass was not frosted enough. We eventually fixed this [...]"

The idea here is that you won't be telling them directly, they're going to realise it on their own.