How , what , who, What?  How you dat?  What dat?  I thought you only are supposed to post public keys, so called "bitcom addresses"?  Then people send you BTC to this bitcom address, I guess signing it with your public key, and only you can decrypt it and spend the BTC sent.  If I import these private keys, doesn't that mean somebody can also import these private keys, spend them first, and thus double spend this amount, and I will be left with nothing?  This stuff is confusing, just when I thought I understood Bitcoin...