I'll bet dollars to donuts that creeping thyme,
Thymus serpyllum, appears on some toxic plant list some place. Most plants are toxic at some level to some individuals. For me the question isn't whether a plant is toxic, it's whether fish, pets or people will eat enough to do harm.
Thymus is using in cooking, but thyme oil is considered toxic.
Here's an Angel Trumpet over hanging my San Jose Koi pond.
Datura is toxic at some level. My Koi ate the flowers that dropped, then ate the flowers that hung down touching, then jumped up to grab leaves and pulled in, and broke off, whole branches to eat the flowers and leaves. They didn't die. Might have been tripping, but they didn't die. I'm not saying toxic plants are perfectly safe, but I think it's less of an issue than one might read.