I dunno, I'm very much from the "don't like doing it? Don't do it then" school: my feeling is that putting in artificial restrictions is the sort of hand-holding that so many RPGers seem to dislike. I speak as the sort of person who always manages to roll a one so I do occasionally do it, but for me the cost of doing so generally outweighs my habitual run of bad luck so I'll refrain unless I'm in a really bad mood. I'd likely be in a worse mood if there was an artificial barrier in place though.
