The # in Instagram
If you are wondering why the use of #s has gone so crazy well look to Instagram. Every picture can have up to 30 tags on it. After 4 years of tags there are millions of some tags out there. If you put in nice words like sunny, Sunday, holiday, or having fun. Then you will get millions of hits.
There are ways to many tags standout. If you add in a tag with your name or the person that is in the picture into your tags like #Joeysunny. Then you will at least make it available for someone years later to locate the picture.