I rarely come out & bust on a girl too hard right from the start...
But I DO usually razz her a little bit. I might call her Nerd-Ball or Sassy-Pants etc...
You CAN compliment a girl, as long as it's not on her appearance. I've complimented a girl on her profile being well written, & gave her props for spelling & grammar. That got an immediate reply back.
You just need to let them know you took the time to read their profile, but without telling her you read it. (If that makes sense)
That's where the playful messages come into play; and making reference to a couple specific things she wrote.
Not many guys are gonna put in the effort I did, to create a fake profile. I only did so in order to gain knowledge & research information.
But most fake profiles are easy to spot...
The 2 biggest giveaways are:
1- Only 1 photo (And usually looks like a model photo from some website)
2- The "about Me" section is empty, or doesn't have much written... and what IS written is so generic & has no effort put into it at all.
Online dating can be a MAJORLY successful way to meet some great women. AND, when you know what you're doing, it's like fishing with dynamite!
All you have to do is NOT make mistakes like the guys in these examples are making.