Ceiling Fans Leaves Blades - Do you know what? The title of the informative article is just out and out misleading. The only actual "con" when it comes to a ceiling fan is what it will take to get one correctly installed. Ceiling fans may be hard to install for the inexperienced do it yourselfer. Sometimes, you'll need to run an electrical line to the location where the ceiling fan will be installed. Unless you're adept at doing this type of thing, hiring an authorized, bonded and capable electrician will more than likely save you a lot of grief in the future.
There's also the minor "con" that involves the issue of periodic care. Properly installed, a ceiling fan provides years and years of pleasant cooling and cost-savings on your heating bill (assuming you've got a fan that enables one to reverse the blade direction).
On occasion, ceiling fans get out of balance and need small alterations. The most frequent offenders are loose screws that attach the blades to the motor casing, blades that aren't at precisely the same angle (pitch) as the remaining blades and a blade or blades that weigh somewhat more than the others. Without going into great detail, be certain that every one of the screws are tight. Whenever they're not tightening the ones that run the fan and have come loose. Your issue continues to be solved, if the wobbling has stopped.
If not, use a yardstick or other straight piece of wood and put it (together with the fan stopped) vertically in the outer edge of among the blades. Rotate the blades by hand to ensure that the stick touches. If one or more don't, simply (and gradually) bend the blade(s) so that their pitch matches the others and repeat the process until you're satisfied that each blade has the same pitch.