I'm 28 and have not experienced male harassment or even come close to. There's obviously a lot of women out there who have been, but I think the numbers are exaggerated and are still small compared to those who have not been.
I think exactly the opposite and would say the numbers are under reported if anything. Women tend to under report because these incidents go from embarrassing and unpleasant to downright traumatising. And as these incidents often happen when there is no one else around, many women are aware that the default setting of many people is stuck in the "reluctant to believe" position.
To give my own example, I would say in the grand scheme of things, despite being well travelled, that I have lived a fairly sheltered, cautious and unadventurous life (not that it should matter what sort of life you choose to live!) and I was propositioned as a twelve year old child in the street by a stranger who pretended to know my family and touched one of my breasts, I only got away because an ambulance driver was nearby having a cigarette, I was terrified and the police were involved. A waiter at a hotel where I was staying with my parents as a teen knocked on my door and tried to get in to the room. A man at university went along the dorm corridor trying to put his foot in my door and that of other female students. I had a man in a hobby group send me inappropriate texts for about six years even though I told him to my face they weren't welcome and could he please stop. I was upstairs on a London bus in the early evening where a man masturbated openly in the seat behind me, forcing me to go downstairs and inform the driver. A man came up to me when I was standing outside a metro supermarket at 7pm in a winter night, wearing a long dark winter wool coat, waiting to meet my husband and said some really vile things in quite a threatening manner, that I had to walk back in to the shop and ask for help.
Apart from a previous thread on here, I have never written all of these incidents down together and I have rarely, if ever, spoken about all of them them to anyone else, not even my close family and husband. Not one person in RL knows the entire list. I'm in my fifties and I have never been in a conversation where incidents such as this were discussed with my female or male friends. It's generally just not done! And I think that's part of the problem.
So this is a very long-winded way of saying that if my experience is fairly typical then the opposite of over-reporting and exaggeration is happening!