default cache_stoplist question

Can someone explain to me (in short words) why the default squid
cache_stoplist contains '?' (and 'cgi-bin' for that matter)?

As I understand http a GET request is always idempotent, so can be cached
unless for some reason the server knows best (in which case it should say so).
 If a request can case a change of state in the server then it ought to use
POST.

Which sites would cause problems if I set this to allow everything to be
cached?

[ As an aside why do so many sites use POST for things which would work happily
  as GETs and thus be cached? ]

 -- Jon
Received on Wed Oct 15 1997 - 16:39:32 MDT