Just queue things up while you're not prepared to post. If anything, you can always sneak a post in while your reports are being sent - it'll only pause one - and continue in the list.
I used to do it this way, and I believe I had a 2 second timer? I still hit that fairly regular. I can't imagine what its like reporting with 4+ seconds. Probably why we don't see a wide range of users reporting, and only a select few. At least regularly anyway.
Until theymos repeals the limit at some point and hopefully add some more moderators to the team - plenty of threads that need to be trashed - you'll just have to do a roundabout solution.
I don't think this is high on the list of priorities.