Great tips, Raidersofthelostgrill.
I have a feeling you are right on why they have the option to punch them out. If one had to have a drill it just may lose a lot of sales on that side fire box.
Definitely agree that one person can do it. I took pretty much everything off of the grill including the legs (to turn them around). It took some effort and some muscle but was fairly easy. The roughest parts were cleaning my socket wrench and bits after the project since they were all grill greased up from the bolts and nuts.
I opted to punch the football out instead of using my drill. It started out a bit frustrating as I banged away with no results. I ended up dropping the screwdriver technique (trying to knock them through the holes with a hammer) and opted for something different. I believe I had an old bolt lying around that was small enough to use in each hole (I figured something flat and nearly as round as the hole would be better than a philips or flat head, hence a bolt end).
From then on, the holes started punching out pretty much one by one. The last hole and trickiest hole was the top of the football. That sucker was a toughy but especially so because you couldn't really bang away too hard on it because (As everyone noted) it would start to cave in the side slightly). It finally came away and the football knocked in easily. If I were to do it again, I'd try and punch out that top hole first and work around that afterwards to get around that problem.
Everything went back together easily. Since I had to take everything off to begin with I went ahead and did a quick water spray on the side shelfs, legs and such and let them bake in the sun while I worked on the football and getting it together.
As always reading the info here was a great advantage before attempting it. I semi-seasoned it over a month ago but I haven't gotten a chance to officially use it as a firebox in cooking (too much stupid rain in TX).