I used to work for a contact centre doing tech support, and one of my colleagues did this (keeping it deliberately vague because there's a BBC news article about it floating about), and it was huge news at the time - noted down a woman's number and started trying to flirt with her afterwards. It caused a massive drama, and widespread data handling regulations where introduced in the wake of it.
Now, it seems to be almost normal, if the 30+% figure is accurate.
What is wrong with these people?