Who can blame them!
The flip side of this is US isn't signatory to UNCLOS so they can murder whoever they want on the highseas, and in the Hague I guess.
>The Philippine coastguard, in a statement, said a Chinese coastguard ship “fired its water cannon” at the BRP Datu Pagbuaya, a vessel belonging to Manila’s fisheries bureau, at 9:15am (01:15 GMT) on Sunday.
>Minutes later, the same vessel “deliberately rammed” the stern of the Philippine fisheries bureau vessel, causing “minor” damage to the boat.
https://www.aljazeera.com/news/2025/10/12/philippines-accuse...
It's in a similar calibre of official disregard for international law.
However, you're incorrect about it just being fishing vessels and third parties. There are tons of examples of Chinese coast guard and navy ships doing this, its not unmarked fishing vessels or other third parties doing it on behalf of the Chinese state.
https://apnews.com/article/south-china-sea-thitu-island-phil...
From 2024:
https://www.cbsnews.com/news/philippines-china-sea-conflict-...
Another incident in 2024
https://news.usni.org/2024/08/31/chinese-vessels-ram-surroun...
And the very violent Second Thomas Shoal incident:
https://en.wikipedia.org/wiki/June_2024_Second_Thomas_Shoal_...
Whoever told you its just fishing vessels doing this are liars spreading misinformation. It has been official coast guard and naval vessels for years. This is very well documented.
[0]: https://www.abc.net.au/news/2025-08-11/chinese-boats-collide...