I have a general understanding of IP addresses, so releasing general information about your location is not necessarily an unwise thing to do on the internet (but you can never really be sure who you're talking to or who is retreiving and benefitting from info that you release,....what is their interest?, why do they seek EXTRA information?), but no one can really have a pressing/urgent, justified, and legitimate need to know your ethnicity or other identifiable info.
You are very knowledgeable about what is to be considered a "sensitive" operation/project. It would be wise to always BE DISCREET and wonder WHY people ask for unimportant details about personal characteristics/qualities (any question containing the word "YOU" is NOSY and "POINTED",......"pointed questions" are not "innocent" questions).
Be wise, be discreet, don't let the "wrong info" be indexed on Google or covert databases. The internet today is very HEAVILY monitored (especially in the U.S.) freely and constantly by intelligence agencies (there is no need for "too much information" on CZ). We appreciate UPDATES, but maybe some discretion would be more useful also.