LUA for "filter-aaaa-on-v4"

Hi all,

Not had the opportunity to test this yet, but wanted to check with those more experienced at LUA scripting if the following has any unexpected side effects:

function preresolve(dq)
  -- Implementation of 'filter-aaaa-on-v4'
  if dq.qtype == pdns.AAAA and dq.remoteaddr:isIPv4() then
    dq.appliedPolicy.policyKind = pdns.policykinds.Drop
    return false
  else
    return false
  end
end

I will run a test when I get the opportunity. Does anyone filter AAAA requests for single stack clients (IPv4 only obviously)?

Thanks,
Djerk Geurts