Poles and weight limits

So, I've been thinking about poles and their strength/usage. I've done a few doubles tricks at pole jams, and it seems to be a pretty common "party" type thing to see how many folks you can put on a pole at once. I think doubles is a great new frontier, but what about the pole itself? I think all the pole manufacturers recommend a weight limit around 200 lbs (give or take), and that limit would almost always be exceeded. I suspect the spinning and jerking motions would be less with two dancers (or at least more balanced), but still... Even with tiny girls, you put four of them on a pole and you've gone twice the recommended weight limit. Has anyone had any problems with this? Mindy