It's a difficult balance I think - this post overplays dacryphilia as some dark sadistic, perverted activity that the world needs saving from and people need to protect themselves from. And while I accept as @Amans lacrimae says there are people who take this fetish to the extreme I would suggest most people enjoy their fetish without harming other people.
You could easy say - don't wear a low cut top or a short skirt in public because guys will look - same could be true for a guys going swimming - it's the norm for them not to wear anything on their top half - I know some women get turned on seeing fit guys with only a tiny pair of shorts on!
There are many many fetishes out there - not just ours - the world would be a very boring place if people could not enjoy what turned them on. As long as it's done respectfully.
My view is as long as I do no harm - ok some people if they knew I was turned on because I saw them cry might feel uncomfortable - but the key point is they don't know. It's similar to the low cut top situation above - will I look? Absolutely - I will glance quickly, but I won't stare - I won't act in a way that will make the person uncomfortable - it's the same with someone in tears.
So, I think the poster has gone way over the top - probably just to get attention - many people who take the extreme moral high ground on things are doing it for their own notoriety rather than the people they claim to be saving.
