Because you are on the site where people who have no understanding of the domain or the problem still feel it necessary to share their opinion on things they don't understand.
"Anna's archives official torrents only" - doesn't put me at ease and it is far far from SETI@Home that was ran by highly regarded university and it wasn't storing any torrents on people hard drive.
Random people should not "just try it out because it is as easy as SETI@Home" - it should be, people who already know the project and would like to contribute but it was a hassle for them to set it up.