Hmm...thats exactly what they have done?
One of the 'additional restrictions' is that you can't wild camp...ie it's banned...in certain areas at certain times of the year in the Trossachs National Park...ie when those who would wild camp prefer to do so. The National Park have indeed 'put the clock back' if you prefer to put it like that.
That leaves landowners elsewhere with the task of having to clean up after what have become known as 'dirty campers'. It is a growing problem in many parts of rural Scotland, not now restricted to Loch Lomond; the Sma Glen, Callater, Glen Etive, Clunie, Butterstone and many others, who do not have the luxury of being able to impose and enforce bye laws. You won't have seen the immense amount of crap left by dirty campers. Ultimately others will seek to have changes in the access law to prevent wild/dirty campers, exactly as this landowner has done in Dartmoor where the laws are different.
No 'clock alterations', merely a recognition that a growing section of society cannot voluntarily behave responsibly and never will. Having said that, the prospect of our current bunch of chancers and idiots infesting Holyrood changing access laws is pretty remote! Sad.
