On the other hand, i think getting blocked is annoying, but it is easier for a guy to overcome. If a guy likes a girl that likes him, and a friend of hers intrudes, he can find some other point or get her number, at which point she might be receptive.
The hard thing is when a girl likes you and you don't like her and she starts making up stories or just outright lying to other girls once you have told her this. That i hate and should be punishable with the lake of fire...