Dunno what you mean by "dangerous." I never had viruses or malware or malicious content downloaded into my PC for downloading CC— and I have downloaded
a lot of CC through the years and with previous Sims games. As long as you browse the Internet (mainly the file-hosting sites actually) with an Ad-Blocker and other security plug-ins for your browser it’s unlikely you will end up clicking in those sort of big flashing “DOWNLOAD ME!!” pop-ups that have nothing to do with the CC that you intended to download and all with unrelated crappy software.
Someone at SimsCave a few months ago had been having problems with CC and asked for recommendations of nice sites, mainly of buy/build stuff. So Soundtracks is going to be lazy and paste you those links:
BAUFIVE |
EXOTIC ELEMENTS |
MANGO |
GELINA |
POCCI |
MARCUS (some sets might be high-poly, but it's often stated clearly) |
DAVIDMONT |
EVERLASTING-GARDEN |
SIMCREDIBLE |
DARA |
KARAS |
KOPOSOV |
ESATTO (some sets might be highpoly) |
TRUTJE |
OBP |
EDITSIM |
77SIM (some objects might be highpoly) |
AMINOVAS |
VERONARELAPSE |
PRZEMUS13 (this creator is under "Falko" at TSR, so be careful with duplicate files) |
AWESIMS |
SIMPLYSTYLING |
CLUBCRIMSYN