Ability to set nomail on initial subscription

I frequently find myself subscribing to a list for the sole purpose of ensuring I can post to that list, since it only allows posting from members. I often read those (high-volume) lists via the archives only, as well as threads that CC me. Thus, I want to set the nomail flag. Often I end up doing so for multiple subscriptions to the same list with a few different email addresses.

Currently, the process for doing that looks something like this: Type in my name and email address, hit subscribe, wait for confirmation mail, confirm subscription, wait for subscription confirmation mail, go back to web form, copy/paste password, log in, check nomail, delete the handful of unwanted emails that arrived in the meantime. Repeat for every list I want to subscribe to, and every email address I want to post from.

I'd like to have a way to set the "nomail" flag right from the subscription form. That would simplify the process significantly; I'd still have to confirm the subscription, but I wouldn't need to bother logging in and setting the flag, and I wouldn't receive unwanted emails from high-volume lists.