Should it rather be classed as flirtatious behavior?
I'd class it as fluffy and flirtatious, yes.
I have no idea how or why you think that is white knighting.
Unless you'd like to define what you think white knighting is?
I've always been of the opinion that white knighting is coming to the aid (whether wanted or unwanted) of a prossy. For example, defending her "honour" by disagreeing with a neutral or negative review or attacking the person that wrote it. All you've quoted is 2 guys who would clearly like to bone lily or her friend for that matter.
I doubt any of what you quoted is worthy of a report.