I'm planning to ignore the old woman who has dropped her grocery bag in the parking lot.
Why would you ignore an old woman in need of help?
I have other things I need to do.
Yes, that is very unthinking of you. You should try to help if you can, or at least ask if she is okay.
It's all she deserves for leaving groceries everywhere.
That sounds rude, we should help the elderly when they drop things. One day you will be old and may need help carrying or picking something up. Kindness costs nothing but a few seconds.