OK, folks, let's see if you people can write as well as you can read.
How do you spot the real SF fan? Do you drop a line and see if they correct you. Can they tell the difference between Sci-Fi and SF? Is it their choice of authors, films or TV programmes.
I'm not going to do all the suggestions for you, just one to get you started.
A real SF fan would not confuse Frankestein with his monster.
Indulge me. What do you use??