Nachi's pointless rants and recollections

Awwww, love, what a wonderful thing.
Seeing couples holding hands while walking down the street. How about the ones that steal a kiss from one another when waiting in the checkout line at the supermarket.
Even more adorable are the teens who just stare at each other for the longest time without saying anything?

I think being affectionate to your significant other while in public is such a nice gesture. Not only is it mega cute, but doing it publicly is a great way to show that person that you are comfortable showing that you care about them and are not embarrassing of the world knowing it.
So what happens when a person is uncomfortable with that kind of PDA, should this person speak up? Should this person come over and say so discreetly?
Or should this person yell real loud and embarrass the couple?

Well the story goes like this:
I was shopping with baby Luka, younger sister and her bf, waiting to get on the line for the Ferris wheel. They were together, facing each-other while I looked into the sweet nothing to give them some "space". Suddenly I hear a woman screaming, she starts babbling something and I catch the words "get a room!"
I turn around to look and I see her starting at my sister and sweetheart. The first thought in my head was WTF?!
Sure this lady couldn't be referring to them, what had they done? At that moment I didn't care, I wasn't going to stand there while this lady kept screaming at them.
I instantly snapped and said "Excuse me, that is my little sister, you do NOT talk to her like that! If you have something to say to her you look for her parents and talk to them!"
My "little" sister is an adult but she could so pass for a child, still, nobody has the right to embarrass anyone that way, especially not my sister. This lady looks at me and says that this was a kids store and they shouldn't be making out.
Well that may be true (they weren't making out btw.), but you cannot go around yelling at people because you feel like it.
The more appropriate way to approach things would be to come up to them and tell them in a very subtle manner that their behavior (appropriate or not) was making her uncomfortable and that they should take down a notch.
No, she decided it was better to scream out loud for everyone to hear, drawing even more attention to the situation.
Clearly my poor sister was somewhat affected, they both didn't say anything, not that they had to, but this lady wasn't just going to get off easy. She proceeded to tell me that I should talk to them about it, I told her I would but she better back off.
I wanted to bite her head off!
I pulled the youngsters to the side and asked them about what happened.
Right from the bat I knew they weren't making out as she accused but I still wanted to know what had triggered that reaction from her. They told me they were just being cute.
What does being cute mean to them? Well I take it as just being all lovey dovey with each-other. I didn't push the matter because I know well enough they wouldn't do anything like that in public let alone in kids store with her older sister and little nephew staring.

Now this may just be me, but am I alone in thinking that this person over reacted?
Had she the right to comport the way she did. I was uncomfortable with the way she dressed and the way her face looked, but I didn't announce it allowed and embarrass her saying it now did I?

By the way, this is the same lady who refused to get off the line to ride the Ferris wheel even though her ticket said 8:00 pm when the only people on line should be the ones holding the 7:40 pm tickets.
Sheesh, what a trouble maker!