Do you mean fanhq, or fightklub? Haven't had malware trouble with either of the sites, although Google does have a warning for DGMA. The fanhq site is pretty much just an archive now; the forums there are down, too.
Except for forum registration, I'd be very reluctant to give Decipher my personal information. (It was a barrel of laughs when their fightklub teaser page was asking for my email address, with no indication of how it'd be used.) Also from what I've heard shipment from the Decipher store is an on-and-off thing, if it's even still open.