Its pretty much due to sites such as pripeciahelp, and general bitching.
To get some official scientific ground to the subject.
Should have been done ages ago IMO, but better late than never.
So to clearify: Its not like theyre saying "OMG, It might ´cause irreversible sides!".
People claim it might, and thus they try to:
1) Prove it doesnt
or
2) Find something they havent found before