A cellotaph is a monument composed of cellophane-wrapped flowers, commemorating the death of somebody famous who the people leaving the flowers have never met. The most famous cellotaph in history was that following the death of Diana, Princess of Wales. The word cellotaph is believed to have been coined by the satirical magazine Private Eye.
In most cases the deceased would have preferred the money to be donated to charity.
Wikipedia is not a cellotaph. Formally, memorials is specifically listed as one of the things Wikipedia is not.