If the neighbor just wanted to sit outside they should be able to in peace.

I actually agree. People will say "your neighbor should have looked away" but the neighbor probably did look away after he saw it. And your neighbor should be able to go outside and not see two people fucking around.

I agree, I'm sure your neighbor would like to be able to look through his window without witnessing some heavy petting, especially if you have a house available.

So now is it a total "Phew glad it wasn't me"? I don't like this new system...

They probably did. You don't have to keep watching to send a message telling them to cut it out.

You're a starburst.

That went over everyone's heads. I was referring to the starburst contradiction commercial.

There's not enough information to infer that the neighbor was watching the entire scene; my immediate interpretation was that he looked out at the wrong moment, likely seeing them lip-locked and getting handsy, before leaving in disgust to type the message. That brief viewing alone would probably be enough to warrant the message sent. I have to vote YDI on this one; it wouldn't have been much trouble for OP to step into the house and make the "public display of affection" a private one instead.

Why is it automatically a guy? There is no immediate details saying he. Could have been a female with children?

Yes, you can.

It's just a phrase people. I'm sure he's not acting that obvious.

Yes, you can.