DrWatson
For the OP, YES, you certainly ARE making a fuss about nothing!
IF you want to blame the BBC, why not instead blame the PARENTS for sending kids out dressed (as YOU think) inappropriately? Why not launch a search so you can try and get them prosecuted?? Maybe THEY don't agree -- perhaps THEY have moved into the present century (give it a try perhaps??) and as several comments have said, girls for some time have been confident/liberated enough to wear what many of us would call 'skimpy' - and it's routine for them.
NB -- in just about every heatwave we've had, for 20 or 30 years, assorted TV companies send out camera crews to various 'baking' seaside vistas, with all manner of body parts on show that would be best covered up. HAVE YOU BEEN constantly complaining? If not, WHY NOT??
As another comment said, children are most at risk from neighbouring or family perverts, not voyeur strangers.
No, it's the BBC who go out with huge professional TV cameras and film lots of footage, then choose a tiny proportion of that footage to show. Of all the many thousands of people who were filmed out and about, wearing all manner of attire, the editors chose to show that particular shot.