Have you ever put rubber bands on your door knobs and do you think it serves a purpose?

Have you ever put rubber bands on your door knobs and do you think it serves a purpose?
Many people claim the rubber bands helps stretch the flexibility of the door. I doubt this is true but could be.

Have you ever heard of this happening and have you done it? If there is a purpose, what purpose would it serve?

Please share your views!
Yes to both (what purpose)
Yes but no purpose
No to both
No but has purpose (what purpose)
Select gender and age to cast your vote:
Have you ever put rubber bands on your door knobs and do you think it serves a purpose?
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