Thanks for the feature request, it would be nice to have...

an addition to show the importance of a possibility to exclude regular automatic visitors:

these automatic visitors may not only have a large influence

• on the visitor count but also
• on visit time.
  one example:
  if the automatic visitor only stay for 2 seconds every hour, while the 9 human visitors within that hour stay 4 minutes (240 seconds) each
  => you get an average of 216 seconds instead of 240seconds.
  => if the automatic visitor visit the site every half hour, you get an average of only 197 seconds instead of 240seconds.

So if you do a modification on your website and "get" one or more new automatic visitors at the same time, you may make a huge misinterpretation of the results of the modification...

by the way:
is there a feature/possibility to exclude bots/robots from statistics?
...of course these automatic visitors with non regular visting intervalls may have the same effect on statistics espacially on small or special websites with not that many visitors

update:
ok i just found a plugin which seem to address this
#2391
download:
http://issues.piwik.org/attachments/2391/BotTracker.zip

just noticed another typical behaviour of an automatic visitor:
if some pages of your website are visited at the same time within/within a short period of time (e.g. 2 minutes) from the same vistor/IP

but not as human (or some normal robots) may do via internal link following
but directly coming from external to each page

a more complete and updated version of this ticket could be found here: ticket #5845
This one could be marked as doublication of the new one.

Thanks for your suggestions, let's continue discussion in #5845