Those big private trackers are such meanies :(
...lets DDOS them :D
lol
But seriously: Download noscript set it to global whitelist in settings and find the blacklist exceptions and copy and paste all the URLs of every private tracker you belong too into that blacklist.
I have always found noscript to be a pain in the arse because it blocks everything under the sun under its default global blacklist. Change it to global whitelist so flash and other user friendly stuff isn't killed in the process and block your tracker URLs.