What a glorious outlet IA is for passive aggressive people who never learned to assert themselves or speak up in the moment. It's acceptable to say something like, "thanks but I'm not really looking for advice, I just come here to garden". But rather than speak your truth like a grown-up (terrifying!) you'd rather sabotage the entire garden, presumingly including people who have not had the audacity to try to make conversation with you. Did you miss the "community" in community garden? Means you share space with other human beings, some of whom you may find annoying. When you can afford to have your own land to grow on you will be able to avoid these pesky humans and be alone with your precious tomatoes. Till then you will have to share and yes sometimes interface with people. But don't fuck up the garden dumbass! Judging by your antisocial behavior you will be easily identified as the culprit.