Some good tips there, especially the grab oldest, that i find is usually the case.
There are a lot of these repacked passworded crap sets around, where the only files are one large fake content RAR file, and a text file saying download password here, with a link to some useless data mining site that will never give you anything.
If i hit one bad set, as soon as i unrar it asks to overwrite existing rar file, i cancel and delete the set, dont even bother going any further, after that i grab the next set on restricted speed and test open the first rar file, if it's another inside i trash the download, and try the next until i find a genuine one.
For me, it is not the ISP bandwidth or speed/time that annoys me with these, but that some of them are coming off my pre-paid "pay by download" astraweb account, so it is costing me for every fake piece of crap i download.
I sometimes wonder if a black list of posters would be handy