You're right. It's very easy to do it and many people do. Unfortunately though the majority of people don't think its their job to pick up others trash, don't care, don't see the trash from everything else or think that its uncool/disgusting to pick stuff up from the floor (that shouldn't be there in the first place). Keep doing what you do and well done! It's our beach, our planet and we are the custodians of it.