I do not want to be rude, but people teasing you in that way are pretty stupid. I have not found anybody doing that to me, but "giving me unwanted advice" about my disability, oh Lord!, quite a lot. Before, I used to respond with a smile. Then, i went to the US and met a lot of brave disabled advocates that told me about self-confidence and saw their determination> i think I learned a bit from them. Now, if people patronize me, as Will relates above, I tell them what I think, or I just leave them alone. I tell myself I should not bother, i consider them to be immature.