Missionary Activity?

[drfuzzy]

Late to this post . . . still reading the replies.  I'll toss in my two-cents worth to the original question, though.  

If you go to sincerely help others without trying to change what they believe and who they are, GREAT.  A lot of atheists do the same.
If you're intent is to disrespect them by telling them you have a special book and all the answers, not so great.  There are a lot of news reports about missionaries making people "earn" food and help and education by listening to all the preaching - or worse, using them as slaves.   And it's a historical fact that many many thousands of people have died because of the diseases that European or American missionaries carried, such as smallpox.   And surely any lover of history, sociology, and anthropology would grieve over the rich cultures that Christian missionaries have destroyed.  (And there is also a record of extreme harm, physical, social, and political, that others have already mentioned here.)

So sure, if you're willing to work, and leave your damn Bible and asshole preaching at home, you're golden.  If you're there to "save souls", your poor victims would be much better off never to meet you.