Go here http://www.livejournal.com/userinfo.bml?user=U2 and read it. Thoroughly. Pay particular attention to number 3 and 4.
3. Please be considerate towards members who do not want their friends page cluttered with images that may be slow to load. If you are going to post photos, use an LJ cut tag and make sure the cut tag specifically says what is going to be seen when clicking on that link. Or join u2photos and post your photos there instead. If you are interested in U2 icons, join u2icons.
4. If you want to post online quiz results in the community, bear in mind that some people will not be interested in them, so place them behind a descriptive cut tag and try to confine them to a single comment thread. Nobody wants to see dozens of separate posts announcing everyone's results to the same quiz!