4 Older Citizens & A Speed sensing sign....

[Munter]

For the last 2 days on my way to work I have passed a group of around 4 older members of our society with a speed sencing sign that displays your speed and a smile or frown depending on your speed. (Sign is in Chalfont St Giles, Bucks)
Whats confusing me is:
1)They always have one of them trying to block the sign so you cant see your "results" easily.
2)It appears to read a bit fast....my speedo said just under 30 (I slowed down to look), but it flashed up 32!

I cant decide if they are having problems setting it up, or they are just noting down the results. If they are noting down the results I suspect everybody will be speeding if it's reading fast.

As it's not a camera i'm not so bothered, but their actions just seem a little strange...

[munter]

I didn't have a "problem" with them using the sign. There is a school nr the road in question, and I try and stick to the 30 limit on that section of road. It was just the way they were using it seemed very curious....