is this becoming more prevalent?

my sister in laws and i were out and about today, and we wound up hitting two different walmarts as well as some other stores. i’m 23 f, they’re 21f and 15f. we’re doing usual sister stuff, shopping for craft night and they’re wanting a new book. (this is at the lake st. louis walmart) anyways long story short, we were followed, stared at, pointed at, and talked about by a group of guys all the way from the start of our trip to check out, where they approached us. they chose the 15 year old to target first, and even though she stated her age right off the bat and that she’s not interested (they’re clearly much older than us all) they got a bit pushy. odd but we push through. second walmart, ofallon one, pretty much the same deal. approached by a much older man who pin pointed the youngest of the group to hit on relentlessly. when she turned him down for the who-knows-how-many-th time, he looked at me and said “are you 15 too?” I just scoffed and walked off because what the actual f just happened!! a second time today?? idk if im just creeped out that they all targeted the youngest girl of the group or the fact that it happened twice in the same day at two separate walmarts (we also hit target, thank god it didn’t happen there. target wouldn’t do me like that) is this becoming a thing more here? I don’t know maybe it’s just been a while since us girls went out. it’s just weird and off putting to us all. we’re still freaked out about it.