Sorry for the late reply but I've been away for the weekend. I didn't want to dodge the discussion this way.
Firstly, the download links to the HOF mod are provided on the GOTM/WOTM download pages so finding them should not be a problem.
Secondly, I do not have an issue with computer security because if I wanted to I could simply decompile the HOF executable and go through it step by step trying to locate trojans, viri and the likes.
The reason why I am wary of installing the HOF is because mods often introduce more problems than they fixes. Looking at the version history I can only discover the whipping bug that they fix for Vanilla and perhaps the Great Persons multiple usage bug, but this one I have never been able to replicate in my games so it could just be a HOF introduced bug. For Warlods it fixes only the Great Persons bug, but again, I have not been able to replicate this yet.
Because the version history shows fixes to mainly HOF introduced bugs and because I don't like mods in general, I am more worried about game stability, rather than anything else. After all, the game is not stable by default, why challenge faith?
I do not understand why we would need to install the entire HOF mod, where only a patch for the two abovelisted bugs would suffice. As for GOTM/WOTM security issues... which ones?
Other than game stability, the HOF mod contains some questionable additions which can be seen as ambiguous content. The technology trading is an example, but also the gold and gold per turn alerts. They provide the player with too much aid and some players will still be able to abuse these things where other players will not. When players need to figure such things out for themselves, they will not do it so easily every turn and the danger of abusing knowledge is much lower.
But anyway, I'll download it and install it, because I enjoy the GOTM/WOTMs too much.