I had a similar experience in a concert i went to (well not really the same) but anyway, these two twins came up to me when i was slamdancing to some music and just threw themselves on me :S i had no idea how to react to that especially when one pushed me onto the edge of the stage and started kissing me!! I thought she was a bit out of her mind but hey with all anxiety aside it was quite a different experience.
Try and see this for what it is and not as them taking the mickey out of you. I admit i'd likely draw the same conclusion, however, i think you should just see where it takes you. Have a little fun with it. Call them.