Nope. I work full-time somewhere else. This is made quite clear by my personal site (linked from my profile). Also, as you'll notice, my posts since I left no longer show me as a forum admin. I don't really like having any sort of "boilerplate" message about all this in my signature, though I have thought about adding something in my user profile.
Just here out of (bad) habit, I suppose (next step is putting an /etc/hosts entry pointing discussion.dreamhost.com to 127.0.0.1 :>), as well as a fellow "customer". My occasional participation here is completely voluntary, and is in no way intended to make DreamHost look bad (or good). And I certainly haven't meant to convey that impression [that I work @ DH] with any of my recent posts (which have been fairly infrequent, at least compared to when I worked there).
In any event, this is an unofficial forum. And anyone who has been on the forum knows that I've always been a jerk, so this is nothing new. Were I an employee, I would probably be more tactful. But I'm not. Anyway, this is hardly the same thing as customer support sending a rude response. If you receive a rude response from support, you would certainly be justified in complaining.
In any event, to be more specific, I think you could have either a) gotten your facts straight, b) been nicer, or c) offered to provide your patches to the Mailman developers, in the interest in fixing the "bugs" to the software which they freely distribute.
I'm not trying to say that Mailman's perfect - as Dallas says, it's not. But I agree that it's one of the best MLMs out there - I'd argue that that's including commercial and non open source products. And I agree that there are bugs - I've come upon some myself (along with some design decisions I don't personally like or agree with). I just don't think that your example is a good example of a "bug" in Mailman.
Wow - sorry for the long-winded response.
 Full disclosure - I have some financial interest in DH, don't pay for my hosting, and occasionally drink beer with some of their employees.
 Albeit a jerk who sometimes knows the answer and / or can get things fixed. Some people like me; some don't. I will manage to sleep Ok at night if you're one of the people who doesn't. I like to think that I'm at least (usually) a reasonable jerk. I'm certainly not above a little intellectual bullying to get my point across, but I like to think that I generally try to provide some actual facts / evidence to back up what I'm saying. And, while I like to be right, I am happy to concede when someone proves me wrong.
In this case, as my backhanded apology was trying to indicate, I'm glad that I was "wrong", because it may suggest a solution to a long-time annoyance.