I doubt there are very many lawyers on the spam protection team. I also doubt the people on that team have any intention of harming minor-league competition. So

I doubt there are very many lawyers on the spam protection team. I also doubt the people on that team have any intention of harming minor-league competition. So it's not particularly surprising that they aren't more careful about avoiding something that a) is not well-known to them, and b) they don't think they are doing.