I'm not trying to stir anything up. Just to find a good way of dealing with similar situations when I come across them.
If you come across such situations it is best to be tactful, especially if as i was, not a member of the shed! If i was visiting a private individuals workshop I doubt i would get involved especially as their level of competence would be more readily apparent & its their business if they choose to work unsafely.
In the case of a Mens shed the very nature of the place means you will tend to have a high proportion of guys (members) who are inexperienced amateurs, many of whom will have zero experience with machines of any kind never mind circular saws.
This lack of knowledge & experience coupled with enthusiasm means the risk level is increased anyway. Add in safety equipment being removed & the risk & likelyhood of an accident rises drastically.
If you are involved running such a place you really need to think about what happens as you have a duty of care towards the other members. Duty of care nearly always follows best practice. So its no good saying "we are not a workplace so dont have to comply".
A yacht club i belong to owns a Crane, it is very old & really should be in a museum. It is owned & operated by the members & rightly is severely restricted as to what it is allowed to do. It gets inspected every year but im sure the inspector treads lightly. Only the other day one of the guys was saying "It only lifts masts" So i said "what about so & so's 4.5 ton yacht it lifted a month ago?". He didnt know or had conveniently forgotten about that. In the case of a crane if the thing breaks or falls over serious injury or death is highly likely, you can bet your life that Hse & lawyers will look at it as have they adhered to best practice & not "Its a club so we can get away with it".