Your AV software should catch any crap, but, if your AV software is shit, it won't.
Another thing is backdoors to the scripts, which you have to search for, and post about, when you find them.
For the most part you are not DLing software from here, but from the RSs, you send it, and the other file sharing sites. Remember these are usually uploaded by other people, and, as such, can not be controlled by anyone from this forum.
Unless you DL it form a members site, so you know who to blame, be very leery about all software you follow the link to DL from anywhere.