The problem is for people with no Perl skills or with no programming expertise but would like the extra features. I've added over 20 hacks and the inter-relations between some of the hacks or slight errors in the documentation means you need to take everything with a pinch of salt.
And trying to MultiHack is fraught with other problems. I had 7 MHKs to add and it took 3 attempts to find an order that worked.
And now that I've got a board that works, I'm worried to death about the upgrades.
I've already identified two faults with UBB v6.3.0 that are not going to be fixed until v6.3.1. I'd also like the "Report to Moderator" feature promised in 6.3.1 too but the idea of upgrading my hacked 6.3.0 to 6.3.1 keeps me awake at night, lol. And all this because I'm trying to play catch up with a competitor's site that runs the cheaper and standard out-of-the-box ... *whispers* vBulletin.