How do you discourage strangers from talking to your children with out being disrespectful in front of the kids..?

I have two little girls, 5 and just under two. Every single time we leave the house we get stopped at least once often by older people, some times other slightly older women and sadly more than I’d like to admit creepy men.It’s always the same thing, you’re daughters are so beautiful, what beautiful eyes, such pretty hair, and the most frustrating “smile for me beautiful” and even when they are grumpy “you’re so much pretty when you smile so you should stop that grumpy face”Now don’t get me wrong a little friendly banter is completely fine when in passing but most of the time we are actually being approached with theses kinda of comments.It makes me sooo uncomfortable and it makes my girls visibly uncomfortable too, and that often leads to further comments to when these old strangers tell you kids they are being rude and I’m like well no they don’t know you and they have been taught not to speak to strangers... this doesn’t get the point across tho and I’m often in the middle of my grocery shopping when I just wanna yell “fuck off ya old creep” but I don’t want to set a bad example in front of my girls but I want to be more direct and firm so they know it’s ok to speak out when people are making them feel uncomfortable..I come from a background where I was always taught to grin and bare it and that I should be appreciative of any attention because I’m not pretty and I’m bigger, so I don’t know where to start but I don’t want to enable this bull shit anymore so please what do I do? via /r/Parenting http://bit.ly/2Jdp050