They are burning my bandwith and maybe yours...
Forget the .htaccess it doesn't work !
HERE's WHY
I have .htaccess installed + LinkSentinel. It is not effective.
I contacted webair 4 times regarding this. 
Looks like they can't stop them.
I wonder if they really care... 
More bandwith burned = More $$ for them ! 
 
Didn't you notice a significant increase in your bandwith bill ?
You didn't care because you have hotlink protection + password sharing protection ?
SO WHAT ?
Surfers now don't care if you are TRYING to protect from hotlinkg with .htaccess, by setting their browser's HeaderReferer to 0, they still can burn your bandwith.