The Riff Raff in Burger King

Every once in a while I drive up to visit my sister in upstate New York, this is about a 4-5 hour drive and usually I stop about half way to get something with no redeeming health value to eat a Burger King. There is one along that way that I prefer as it is very convenient to the highway.
In April I found myself stopping at this particular Burger King, while I'm sitting there eating my BK Big Fish, I overhear an elderly guy. And I'm not even trying to over hear him, which is unusual as I enjoy eavesdropping in random place. This person starts to get louder. He is saying things like "look at her, yak yak yak." I don't think much of it and pull my phone out to check if I have any messages, at which point I hear "oh now she has her phone out, look at her." This makes me feel weird as the place is not very crowded. I look over at this table where all the yakking is coming from to see a large old man staring at me along with two old women; they all have thick glasses on which make their eyes bug-like and crazy. The do not stop staring when I look at them as they clearly think I am a freak of nature. This makes me for uncomfortable and a strong urge to flee comes on.
On any given day I'm sure I do lots of things that could warrant strangers making fun of me, but I don't think I've ever had this sort of experience with the elderly. I have to walk by them to leave and manage to look at them again and sure enough their crazy bug eyes followed me out.
The last time I visited my sister I decided to stop there again, assuming that the menacing old folks have moved on and it is a much more crowded July 4th weekend. While I'm waiting for my food, I think I had a chicken sandwich if anyone was wondering, the 16 year old cashier starts yelling "Don't you want your change!?" Everyone turns to look at an old man, the same one that was making fun of me in April. He is standing in his glory with the crazy eyes and a bizarre grin on. Another customer offers the cashier that he will take the change over to the man, the cashier declines with an exasperated "He does this all the time!" After standing around for a while he goes over to a table with other old timers seated at him, where they just sit around, stare and point at other customers. It was like a geriatric version of Mean Girls. I will definetly stop there again on my next visit.