On that matter though, here's what copyright.gov has to say:
"There is no such thing as an “international copyright” that will automatically protect an author’s writings throughout the world. Protection against unauthorized use in a particular country depends on the national laws of that country."
To use a claim for any purpose other than enforcing your own copyrights (since 'illegal images' is such a broad term) is illegal in of itself.
The DMCA itself has no jurisdiction outside of the US regardless of the person accessing the data is within the US.
In order to submit a DMCA claim, one has to do so under the penalty of perjury.
https://www.law.cornell.edu/uscode/text/17/512
>(vi)A statement that the information in the notification is accurate, and under penalty of perjury, that the complaining party is authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.
A DMCA claim isn't a "notification of illegal images." It is a statement of "I own the (copy)rights to this work and you do not have permission to host/use it."
Chucking a DMCA in the trash sounds like it's against Dutch law