[nznog] people blocking "all APNIC space"

There's recurring wisdom on other lists that people outside the Asia Pacific region routinely block "all APNIC space" in order to reduce the amount of spam they receive (the most recent example was on NANOG, when someone inferred that APNIC address space was useless because it is so regularly blocked). I've run MTAs numbered within 202/8 and 203/8 before, and I've never noticed a problem; if the practice of blocking all APNIC space was that commonplace, I would have expected to have noticed. Maybe I was just lucky, or maybe these block-happy ISPs don't include 202/8 and 203/8 in "all APNIC space". Anybody here noticed widespread blocking of any APNIC ranges by ISPs elsewhere in the world? Joe