Very passive aggressive on her part. I'm betting she doesn't like your bamboo shade and this is her way of attempting to control your putting it up. Does your shade hang on your side of the wall only or is it situated smack in the middle? If it's smack in the middle of the wall, technically, it's invading her space too, so you may need to move the hooks over an inch or two. Then, after moving the hooks (if applicable), I'd take the shade out this weekend and let her know that her plants are in the way of your shade.
You - "I'd hate to push your plants over to your side and have them fall off of the wall. You may like to find another place to keep these lovely

plants so they don't get damaged by my shade!"
Her - "Oh, but I don't really care for your shade. I think these plants look much better"
You - "Well, we like our shade and we've had it here for a few years now. You may want to find another place for your plants so they won't get damaged when we put our shade down."
And regarding the "activities" - I agree with clapping/cheering. Do you have a TV in your room? Maybe blast it for a few minutes in the middle of her "enthusiasm." She, as well as her "friend", will get the message.
Good luck. Next thing you know, she'll be telling you exactly how to mow your grass (I had a neighbor from heck, too!).