Where are you seeing this multitude of old folks having said problems?
I don't know many people who got the booster, and can't think of any personally who were injured by it.
But a friend of mine told she that she knows nine people who got the booster in the 60-69 age group, and 8 of 9 got sick from it, for about 4-5 days [as in, bedridden during that time].
I have no reason to doubt her. I will be monitoring this system as time goes on.
Truth be told, I don't know many who got sick from the virus OR the vaccine so far.
I'd say - treat it the same way you would a flu shot, but keep in mind that there is no way to sue Big Pharma over adverse events.