Its generally agreed that the name is Istanbul and not Constantinople, people are less likely to mess that one up compared to cpc and ccp. For every one person who is actively policing their words to use ccp or cpc there are thousands if not more people who really don't care regardless of their actual opinions on China or communism. Hell, I bet there's a good amount of english speaking leftists Chinese and otherwise who use ccp and vice versa with the chuds and cpc.