Bad grammar

You know what I have an issue with? People with bad grammar. Sometimes it's almost sacrilegious not to correct them. But whats equally as bad are people who correct other people's grammar. New Year resolution one out of many: stop correcting people's grammar. Immediately leave the premises, head towards nearest toilet, look in mirror and sputter " 'A' is only used when the noun following does not start with a,e,i,o,u." , wipe sweat off forehead, look in the mirror, wink and head back and continue conversation as usual.