Jolly Roger wrote:Repeated technical fouls can result in a time serving penalty.

While that is true, it is--shall we say--highly unlikely that an official would make that call. You are correct that repeatedly committing the same technical foul can be a (releasable) USC, but I've never called that nor do I know of any officials who have. I worked with an official who threatened to call it after the same guy had gone offside four times in one half, but the guy wised up. In any case, I think this is intended as a way to give officials a more powerful tool when a team is somehow gaining an advantage by intentionally fouling (e.g., Team B is man down 3:00 NR and keeps holding A1, drawing flag after flag, with the idea of killing penalty time and knowing if A1 scores the flags will get waved off anyway; change it to a personal and it doesn't get waved off on the goal). But a good try!
There's another, much more likely way this can happen, though, and although I've never actually seen it I can easily envision this situation occurring.