The only way to have a publication legally banned in the United States is to have it declared legally obscene. Obscenity is a local consideration and it's practically impossible to get something banned universally. The only way publications are kept out are complaints to vendors and/or the willful adoption of mandatory rating systems, which generally have a rating that is equivalent to a commercial blackout (see "AO" from the ESRB or "NC-17" from MPAA; material so rated is not generally available because most "respectable" vendors refuse to stock it).

IANAL.