At least three to suggest that one must think outside the "box" to change the bulb.
One to suggest that the lightbulb is really a manifestation of inner weakness and desire.
One administration to confiscate the lightbulb as a security risk.
Two to pat down the person changing the bulb, for unauthorized tools.
Two inspectors to determine that proper approved data was used installing the lightbulb.
One bulb inspector to assure that only a parts-manufacturer-approved bulb was used, and verify the custody chain on the bulb.
Two folks to do background checks on the bulb installer.
Avbug, to disavow any knowledge of the bulb, it's installation, or the circumstances of how it came to be, and to whine about being implicated in the whole affair.
Somebody to toss in gender or racial issues related to light bulbs.
At least one person who complains that we have gotten too far from our roots with the whole lightbulb issue, and who advocates returning to candles.
One lightbulb abuser.
The monkey who steals the lightbulb.
At least three dozen folks who want to know if they're too old to screw in a light bulb.
The bear, who eats the monkey, who stole the lightbulb.
How many people does it take to screw in a lightbulb? None. You can't fit people in a lightbulb.