Well prior to tornado cash and whirlpool prosecutions no one developing lightning or privacy tools had any reason they would be Targeted. Things change. Why a proper delete function is important imo.....
Discussion
But your probably right if your building certain things you should definitely not be posting and only use secure channels to communicate.
You're right about that.
But given that the scope of things that "may become illegal in the future" is basically arbitrary and infinite, at some point you just have to throw up your hands and say "I feel morally okay with what I'm doing and I'm basically powerless to hide in perpetuity if I want to share anything I do".
Some day this may not be the case, but I believe it is today, sadly.