Did I hear someone say mullah and fatwa?
You are going to hell for your avatar, you induce people to drink 7up, the money goes to infidels.
On a serious note, yes this is mostly a desi thing and rather annoying. I have never been corrected by anyone, and I believe it has more to do with the way I look (bouncer'ish, they say). I have never seen two chinese or african fellows correcting each other's english, and we all know how perfect their linguistic skills are. It is a matter of being better-than-you I believe.