I don't know about you, but since it only sends to any person once, and it's supposed to be 'fun' (even if it's not for most people)...
I think it'll be a waste to flag it since even flagging costs voting power....
I always think it's better to reward good content than punishing the bad one, unless it's going too far.... and as far I've seen this bot? it hasn't gone that far yet... there are many scammers deserve flagging more than this bot.