Filtering is more accurate if you simply correct its mistakes as they occur
If I have to correct false positives as the occur,
this so-called "filtering" is no good to me at all,
because it means I have to go through all the spam.
Worse than useless. My existing filtering system
is significantly better, because I am confident
that 100.000% of everything filtered into the spam
folders is, in fact, worthless junk. Additionally,
*most* of my legitimate mail is filtered into
various spam-free folders based on topic, list,
sender or whatever. The only mail I have to sort
by hand is the stuff that lands in my inbox (because
none of my filters pick it up).
I don't want to correct my filter's errors continually.
If I have to do that, it's not doing its job at ALL;
*I* would be doing 100% of the filter's job, then.