Gardening and home streets
I've seen a LOT of people complaining about never getting any of the herbs (or produce) that grows in their home streets, because other players come in and harvest them. I have quite a few thoughts on this topic, so bear with me.
1. If your main concern is having enough herbs (and/or vegetables), then clear out everything in your back yard. You can fit five large herb gardens in a back yard. That should, honestly, be more than enough for anyone.
2. But, you say, I want to have trees as an easy source of bubbles/fruit/whatever! Or barnacles! Or other self-replenishing resource. No problem, those can all go right in your front yard, and you will have none of the problems associated with gardens. You'll have easy access to it without competing with other players.
I actually feel that putting trees in your back yard--if having enough herbs is an issue for you--is a waste of space, considering the SAME trees will give you the same amount of items in your front yard, with the added imagination bonus from other people using it.
3. Your home street is a public resource--but it's a public resource that benefits YOU the more people use it. More traffic = more imagination for you, something you get every day--and you don't have to do anything except click on your magic rock once a game day. I've also found that more traffic = more sales in my tower.
4. Because of #3, your best use of that public space is to make it as attractive as possible, with minimal upkeep. Unless you decide to join a resource route, try to balance out slowly renewing resources (such as jellisacs) with ones that replenish quickly (or with trees, which need only be watered and petted if they run out--and it takes a LOT for them to run out).
5. You will be FAR less stressed out over the home street once you accept that, because it is public, you really cannot control how other people use those resources. Yes, you could vigilantly monitor the street's comings and goings and ban every single person you think might have done something you don't like, but is that really an enjoyable way to play? If your goal is to grow lots of herbs, your time would be better spent tending your 5 backyard plots and gathering piles of guano rather than struggling to compete with all of Ur for your home street gardens.
So you've really got two easy choices: Either remove gardens from your home street, or relax and don't fret about how they are being used. In either case, you can get what you need from cultivating your back yard.