If I continue to get this crap I am going to discontinue all my use of AMPRĀ and 44Net.
Using services is quite loosely coupled to the choice of subscribing to a mailing list that discusses them, but Dave's disgruntlement adds juice to what I've been thinking in past months:
Given the low level of traffic on a mailing list that I assume has a large number of subscribers (if not, a large percentage of them sure find it hard to protect their email account!), changing the list to moderated would likely be a net positive to the overall membership, even though it would bring extra work to a few and delay the appearance of messages.