In my speech therapy, there were kids with more ST needs and some with less ST needs. Since we were all learning together, it was common empathy for us to try to help each other out and model the words to help. I've always appreciated people who help finish a word I'm stuck on. I'll still say it after they do. I suppose it depends on their attitude - if they seem annoyed or short, I'll just stop communicating with them - they're not worth the attitude. I assume most people are just trying to be helpful. My general philosophy is I probably won't meet them again, so I'm not going to invest in an emotional reaction.