I think I might have gotten some spikes in my car tires meant for a neighbor

My neighbor died with a messed up will and a friend inherited half of his property. This friend is having a hard time with a psycho woman who was living in the deceased neighbors guest house and claims the whole property is hers. (she is not in the will for the property.) Anyway, she took apart the water pipes going to the main house and did some other destructive stuff. So, my friend left town for the holidays and asked me to go feed the deceased neighbors cats. This is a very rural neighborhood (all dirt roads.)

Anyway, I go feed the cats and get a flat tire - 4 spikes in a row, almost touching each other. Spikes look a horseshoeing nails without the tops. Even if someone dropped nails, having 4 standing upright in a row???? I'm thinking spikes might have been placed in his driveway. Do you think i'm being paranoid?