How to prevent the logout from the site ?

After a short period of inactivity, there is an logout from the site. How to prevent the logout from site ?

I find that drinking and saying nasty things to the computer does not work to solve this issue for the computer...but it helps me a bit :-)

You cannot avoid the automatic logout as this is Something that has been put in place a few weeks/months ago by the administrator if I well remember to prevent attacks by spammers.

This can indeed be annoying but less than seeing spams and adverts allover the forum.