Quite possibly perhaps that might be true-ish to some extent, I think, but take that with a grain of salt, I'm not an expert, that's just my wild guess :-p
It's pretty ridiculous to peel that off the following qualifier.
Readers have been aggressively attacked for a long time. It's certainly not impossible that some basic demonstration PDF will cause an issue, but it's probably not reasonable to expect it.
Quite possibly perhaps that might be true-ish to some extent, I think, but take that with a grain of salt, I'm not an expert, that's just my wild guess :-p