Silver supports only ward bushes.
One of the most infuriating experiences in ranking up my smurf account is supports. Basically their logic is that if they ward a bush they won't be ambushed. BUT, once you get a glance of the whole summoners rift map, you will notice instantly that bushes are placed where vision will be isolated. This is of course game design so that ambushing will be a strategy that won't be god.
What do they also do not realize is that warding jungle entrances, open areas in the jungle where crossroads combine would grant a large amount of vision with a single ward. Instead, they will ward a blue/red buff and say "jobs done" while granting no sufficient vision at all. People do not even spend their time in that position.
All their time they talk about competitive tounament scenes and OP champions. But they do not even see how vision is being taken or wards are being placed. It is like playing chess with no knowledge of how the board even works. Hell they do not even seem to know a jungler comes out from a JUNGLE because of this. They ward bushes
This was a long post. But to put it short, if you are scared that much of a 40000000 AD garen inside a bush, isn't it more wiser to ward a more wider area so we can know beforehand that he is in the bush afterall?