I was walking in the hallway while classes were changing. I happened to glance to my left and two students who were a couple feet away were all over each other. I have zero experience on how to handle this type of situation and I didn't want to embarrass myself in front of students, so I chose to ignore the situation. Other students were around these students and the moment was awkward. The students did notice my presence, however they didn't know who I was; just that I had noticed them and probably looked as if I was irked.
This is the correct way to handle the situation.
I agree, I wouldn't embarrass them, I would warn them and tell them this behavior is unacceptable and will have to go to the principals office to explain their actions.
Good solution. Let them know the rules and that you must enforce them.
You still have to be the teacher.
I don't feel as if yelling "eew" is appropriate. I feel you can still keep it light and not be overly harsh for a first time by simply saying "this isn't the time or place" or "hey, not here". Neither of those are going too far but still a more mature way to say this.
I do not agree with this solution. If you joke the first time then it is not a warning.
I don't think that's an appropriate way to address students, they will not take you seriously.