"Personal experimental project" is just that. Only you use it. Once you let an outside person use it you have distributed in the eyes of the law. You are open to suit and are no longer within safe harbors of personal use.
If you are making something for others to use, incorporate. It will cost you a few hundred dollars per year in filing fees, but that is just a type of insurance against times like this.
If you are making something for others to use, incorporate. It will cost you a few hundred dollars per year in filing fees, but that is just a type of insurance against times like this.