Image Agencies/accounts

I heard there are some imageagencies that are very strict. I heard Wireimage, celebphoto/iamge, and getty are very strict about their images and sometimes sue fansites.

Are there any more that are like those mentioned above?
I especially wonder about these listed bwlow:

Newscom
AlphaPRess
Uppa
Corbis
all action
dailyceleb
retna
hutchins