6).No matter how tempting it is, please don't use people's artworks as your icons without their permission. And excuses like "Eh, they'll never find out I used their art" won't be accepted. The Internet is a small world so don't take it for granted.
7).Please don't share links in public, unless you want to go as far as emailing the web-admins to ask permission to link them. You should notice that some of these fansites have English warnings wanting you to email them if foreigners want to link to them (publicly). Another reason to not plug in public is so that strangers won't pass by your journal and do the above crime.