“When will Jews get SERIOUS about stopping this very dangerous evil?”
First get serious about stopping the Open Orthodox.
First get serious about stopping the Reform.
First get serious about stopping the Conservative.
First get serious about stopping the Reconstructionist.
First get serious about stopping the secular.
First get serious about stopping the Avoda Zora worshippers (in churches across the country).
All of these are much more very dangerous evils than that of which you worry yourself about.