While average looking guys like me are quick to get riled up by stuff like this how is it different to how guys would behave? If an unattractive girl messaged (maybe overweight, maybe just not pretty) you would likely ignore as well.
The only difference I think there is seems to be females generally have a much higher standard in mind. The height thing instantly is one of those criteria that can end a guys chances, and I'm sure it's been shown girls pretty much ignore anyone under 6 foot or in the high 5's, which is pretty harsh, especially when the woman in question is like 5'2! A lot of guys would be happy with a much more average looking female than the reverse, us guys just have lower standards! However I don't think there's anything too weird here. Plenty of women just want sex, just the same as guys, so someone highly attractive to them offering it is all they need to go ahead.