We have to frame any and all references to not allowing ships to deliver to Gaza as an "arms imbargo". We are trying stop "gun runners". The world out there gets it's perceptions formed by short phrases, sound bites and segments of video.
Greek authorities find 5,000 shotguns, 500,000 rounds of ammunition on Libya-bound freighter (AP)
from the article: Israel launches campaign to halt Lebanon flotilla bound for Gaza