Mixture - you are into PRISM-land if you think email hosts should monitor outgoing for spam etc, are you not?
Oh dear.... I had rather hoped to have got you onto the right page BOAC, but you seem to have switched books instead !
Let me spell it out :
- Email host provides facility to send email = Fine. No problem.
- Unscrupulous individual uses facility to send spam etc. = Bad
- Internet community attempts to make contact with email host via abuse@ or otherwise = Expected
- Email host denies it has anything to do with them / ignores reports / takes long time to respond = Bad
Result = Email host punished.
I know lots of people who use shared SMTP servers without issue. The only people who have issue are those with shared SMTP providers who either have mis-configured servers or who fail to take prompt or effective action on abusers.