I'd like to think that the government is a giant bureaucracy, where ICE doesn't talk to USPS, or they are extremely inefficient at sharing info, but with computer databases these days, it could be trivial to share lists of flagged addresses. Should you use another address? I don't know. You might try shipping something to your address that looks like drugs, a bag full of baking soda or something, and see if it gets opened. DON'T order one of those parcels with drug smell on it.