Double-boots is an effective break-down, which is an improvement of position. Before they outlawed putting in a half with both legs in, there was much more potential for scoring from double-boots, as well. Not so much now, unless the top guy can work for a wing. Either way, one or both legs need to come out once something is secured for a pinning combo. If the top guy has legs in (crossbody or both), it isn't stalling unless he isn't trying to improve position (e.g., break the guy down, secure a wing, turn the hips, what have you).
Now, I'll admit there seem to be plenty of times that guys do just enough to "look busy", and that stalling is occurring in such situations, but it is a judgment call officials have seldom been willing to make these days. Especially on guys with track records for generating potent offense much of the time.
But to suggest legs should just be outlawed entirely is going way too far. That's a significant part of the sport. I find leg offense very exciting when guys are able to generate offense from it. They do so often enough overall that its elimination -- or that an automatic 5-count be implemented -- should not be a real consideration.
