Lito lalo |
I can see possible value of allowing this at first level, if you were to limit the number of skills that you could go negative on.
I'm not sure it's realistic to have characters get worse and worse at some skills as they grow in experience and overall ability. "Yeah, Victar over there was bad at figuring out how much things were worth when we started dungeon delving... these days, he doesn't know whats more valuable between gold pieces and copper pieces"
It might be funny, and if that's the kind of campaign you want then by all means... but I would limit this to a first level thing to allow low skill rank classes to pick up a couple extra class skills. No negative skill points after that.
Of course this is an optional thing for the PC's they don't have to take it if they don's wish to. I think its of value to allow them to choose what they can take penalties on to get different benefits on other skills.
This could also symbolise skills being neglected in exchange of expertise on others, no?