So, using this logic, if I dispatch a flight that is due to arrive within the 10 hours of my duty day and it subsequently encounters a departure delay, my allowing that flight to leave is a violation of regulations? I disagree. There is no regulation that specifically addresses this.
I disagree on technicality. Though it certainly doesn't make sense to fire off more releases that will exceed your duty day, there is no regulation prohibiting such practice.
Remember, the regulations say what they say, and they don't say what they don't say. 121.465 is VERY specific about what it means. Nowhere in there does it indicate that failure to comply WITH THAT SECTION is a DISPATCHER violation subject to certificate action. You ARE authorized to continue your duties beyond the 10 hour scheduled duty time, subjected to your ability to safely continue to perform your function. We are offered NO rest protection under the regs beyond that which are stipulated in 121.465, specifically 8 hours of rest between shifts and 24 hours of every 7 days or the equivalent thereof (read: 4 days off in a month).
So if you get stuck beyond your 10 hours shift and you decide to shut it down, by all means do so if you feel it's the safe course of action, but for god's sake don't stand in front of your director of operations the next day and tell him you did that because the regs said you had to, or you're going to be very unhappy with the results.