Guys just in case you weren't sure .....it is NEVER ok to just show up unannounced hoping for an appointment and more not cool is when someone is not home and doesn't answer the door to hang out on their patio until they get home
So sorry that happened to you. And it is wrong on sooooo many levels.
For example, what if you were busy with a new client and that's why you didn't answer the door. Imagine how that guy would feel. Even if the lady only sees one or two guys a day, she may look like a revolving door. Or it could look like the lady has a pimp, even though she may not. Hearing a knock on the door could ruin the entire mood.
Or another example, what if the lady is out on a RW date and they come home to find another man hanging around? What if she has young children there?
I could go on and on with many other examples or scenarios. But it's respectful to contact the lady first.