Yea its ok but there are so many other openers are better used. For one i dont like the mindset you put the person in. Meeting someone for the very first time and the first vital minute of your only interaction your talking about stalkers and using words like 'creepy'.... is..well..creepy!
That and if your still in the mall she could ask where she is now etc. Too many holes to fall thru. But if you think you have what it takes follow it up with some humour maybe and ask her about her own stalker encounters. I reakon you should open her on a good note, uno approach with a smile and good vibes.. it would only be incongurent to open with good energy with this topic. I reakon think more about it and make it into a DHV story mate!
Personally i dont see this stalker opener as pre-selection but it feels more like your attention seeking. I actually have a stalker routine used as a DHV story that works a treat
Good luck either way! Cheers