Here’s an article about it:
https://www.wtsp.com/article/tech/science/space/boaters-swarm-spacex-crew-dragon-capsule-at-spashdown/67-fa2c9eeb-e3bc-4a0f-8917-bc5a2374254e
And a Reddit discussion:
https://www.reddit.com/r/SpaceXLounge/comments/i2homp/i_am_pretty_damn_sure_this_wasnt_suppose_to_be/
I don’t know if it was illegal or not, but they weren’t supposed to be there and it wasn’t smart.
https://twitter.com/MilesDoran/status/1290082383002087424