One particular guy,

Anyhow, there is a way to keep people like him from linking to your icons/images and stealing both them and your bandwidth.
To remove your own journal from these feeds go to The Admin Console and input type set latest_optout yes and click on the execute button. Make sure that you are logged into LJ when you do this.
If you run a community, type set for communityname latest_optout yes, replacing 'communityname' with the plain text name of your community (no lj code).
ETA: As
set synlevel option
set for communityname synlevel option
The options are:
* full - includes full entry text
* summary - includes excerpt of entry text
* title - includes subject lines only
examples:
set synlevel summary
set for bloodclaim synlevel title
You can see the links to your feeds and therefore what their content is in this FAQ.
ETA2: Also courtesy of