True. No one would ever suspect the motives behind or security of a system that suddenly sends emails out to a very large number of addresses! :)
(That said, I do believe it to be a good idea - but maybe some work from a few people/organisations to share the load - and perhaps Google, MS, all ISPs etc could email their own users who appear on the list - although that said those emails could also cause issues - say I was on AM and forgot about it and am since married or....)