Several major manufacturers are beginning to do so. Sometimes I forget. If glass is put in with other recyclables it does not get recycled. Instead, it becomes a very serious contaminant and interferes with recycling other materials. Glass shards end up in paper bales, turning the paper into garbage, and can seriously damage recycling machinery.
City ordinance prohibits throwing yard waste in the garbage.
And tape is best removed, too. A little tape is okay, but too much causes processing problems. A box with a lot of tape may end up as garbage, but can easily be recycled if it is removed.