This idea is grossly wrong one. It has developed among a large section of people- may be due to some misunderstanding- or may be due to some unintentional but improper presentation of facts by a section of media.
ISON will come at its closest distance to Sun on 28th Nov. Thus, instead of becoming visible, it will remain hidden behind strong aura of Sunlight. The comet is expected to become visible again after 5th or 6th December- well… if it survives the extreme level of heat and Solar wind pressure at that close distance from Sun. As a matter of fact, it has already become invisible. It is also disintegrating minimizing its chance of re-appearance in our sky with a bright and glorious glare.
WARNING: Comet ISON is extremely close to the Sun and you should NOT attempt to observe it in binoculars or telescope unless you are highly experienced in making these observations. LOOKING TO SUN WITHOUT PROPER SAFETY MEASURES TAKEN OF EXPERT GUIDANCE MAY BE DANGEROUS. IT MAY CAUSE IRREVERSIBLE DAMAGE TO EYE AND/OR OPTICAL EQUIPMENT.