I don't mind them asking but they need to accept appropriate/plausible answers and cannot demand ID.
Normally I would get:
- 60 minutes of cycling per week (minimum - if I only go to work or the station each weekday)
- 100 to 180 minutes of vigorous intensity, playing football, per week (depending on how often I play football)
- 60 to 180 minutes of light activity involving football but not playing it competitively; ie. I will be walking or jogging around the pitch and not running at high intensity as it's not competitive for me.
- A reasonable amount of walking in the course of a normal working day as some of the jobs I do involve a fair amount of walking
- In addition to this I occasionally go for longer walks or cycle rides, sometimes with forum members
I am therefore going to do a suitable amount of exercise, as I see fit, to replace that. The fact that some people don't want me to do this will make me want to do it even more; I know you like saying "I am not going to change my mind" but guess what?
I am not going to change
my mind

The fact I know you won't change your mind isn't my loss; it's yours!
I know I am right to do it and many people I know agree with me.
The idea that the figures you provide above are enough to remain what I would consider suitably active healthy are not figures I accept. They will be the bare minimum and not something to aspire to!