Sometimes British passengers can just be a total embarrassment. All this alarm probably came from one or two passenger 'loudmouths' egging the others on. The scenes of hysteria must have been excrutiating. Fuel draining out of vents is a not uncommon event. Whether it was overfueling or just draining out of the pipework, it was not dangerous. The fuel itself is pretty inert. You can stand in a puddle of jetfuel, light a match and drop it into the fuel burning, and it will not ignite. Until it is in spray form, it won't do anything. The 'danger' level was zero.