The last time I went to Walmart was in March of this year. There was a woman who had her kids out selling candy bars for money. No, not for an organization, just for money. It was around 9 at night and my son had already been in bed for an hour.
These dirty little rag-a-muffins should have been doing homework and getting a bath. Instead mom was pimping them out.
I stopped and spoke directly to the children. I asked them if they had done their homework, they said no. I just kept walking and went inside the store. I was moved to buy each of them a toy...it was two little boys and a little girl. I took it back out to them and gave each of them their toy and told them how important it was to do homework and to get good grades in school, I then gave mom a lecture about if she was going to have them out here doing that shit the least she could do is bring their homework with them! Told her she needed to get them home and in the bathtub and in bed.
She was so happy for her kids, she made sure they each said thank you about a million times.....they left after that.
So to answer your question, I am frequently moved to commit kindness to complete strangers and no I do not think it makes you crazy.