That's the only way to do things. Hollywood has been spoiling the audience as of late ...specifically the SAW & HOSTEL films where people look forward to the gore and shock value a film brings to the table...this is the wrong way to do things...what's next Horror-porn?
Back when I was in college I showed my buddies countless Horror Classics and they were not impressed because they were used to seeing films like SAW 2 and Hostel, that showed the blood & guts and traditional creepy tactics like long shots, eerie music was not enough.
Hitchcock was the master of suspense. He tortured the audience, showing them the absolute minimum and his films have stood the test of time. He believed the human imagination was the best weapon of all .... if his audience doesn't see what they're looking for, their imagination will run rampant and create a monster/villian much worse than he could ever create.
When it comes to film making, torture the audience, earn their respect and bring along for a ride they won't forget