Is this like an abducting technique?!?! Because I'm still having anxiety

Today my friend and I took our two year old daughters to a carnival. We waited our turns with another lady and her daughter, so our kids could go on this dumbo ride. Although the seats were wide, we put the kids in one per dumbo (since even the lap strap was almost too tight for even one kid, otherwise my friend and I would've put our daughters together). And we stood at the bottom of the ride to take videos of our kids. Next thing I know, the lady who was waiting with us runs up the stairs to yell at this lady trying to put her son in the dumbo with her daughter. (The lady didn't ask or anything, just took it upon herself to do so) and then next thing I know, this lady walks up to my daughter and tries to unbuckle her the strap, and I bolted up the stairs! Maybe not appropriate but I said "excuse me what the f*** do you think you're doing?!" And rather than talk back to me, this lady yells "no one will share" I proceeded to tell her that if she asked, rather than try to touch my daughter, I could've put her with her friend, and this lady blaintly ignored me and stormed off with her kid. Who in the world does this?! Maybe I'm overreacting but I literally feel sick that someone would walk up to a random toddler and try to unbuckle them from a ride 😭😡