LunaC - 10:17 am on Feb 3, 2013 (gmt 0)

Would this be cookie territory?

eg.
Stage 1:
Use regular hotlinking code in .htaccess but allowing blank referrers

Stage 2:
Once they land on the page, test if the real page is loaded on your site by a real visitor using a cookie. If the cookie is there, show images. If no referrer and no cookie, block / redirect?

I know nothing about cookies or if this is even possible, just thinking off the top of my head for possible solutions.