Is it a crime to feed birds in the park?

Today my mom & I went bird feeding as usual whenever we stroll by the park. While we were feeding the birds, this one angry b*tch a$$ lady came & b*tched at us about bird feeding. I wanted to say something back at her but my mom told me to just run. When we ran to our car, I looked back & the angry lady threatened us with her cane shouting at us that she could call the police & send her to jail if we come by to the park to feed the birds again. My mom told me that she has mental issues. Is it a crime to feed birds outside? & can we go to jail with this reason? Could we still continue to feed birds? What if that b*tch comes back?