Why asks http://ubuntuforums.org me silly questions?

[Detlef Lechner]

Hi,
I'd like to search the web site http://ubuntuforums.org, for example for
the search term 'Ekiga'. There is an Edit field 'Search' in it. Why do I
have to answer a question such as "How many ears does the average human
have?" before the search starts?
It is a nuisance because it steals my time unnecessarily.
Pleas do not not tell me that there are no programs to combat DDoS
attacks.

Regards,
Detlef Lechner