woody, just because you can't feint fast manually, doesn't mean that others can't. I'm not saying that feint macros don't exist, but you can definitely feint very fast without them. It doesn't work very well on a $5 Logitech wireless mouse, but any decent gaming mouse should be fine.
I still don't see the advantage of using them, even for a bad player, as it would give you less control of your character and make your offense predictable.
Fast feint spam is so 2011 anyway, everyone knows how to block and counter it.
I'm pretty sure cRPG has some method of detecting auto block, but the fact is that there are players that can block almost anything without any "hacks".