I do, but not to deter commission theft. Outside the IM niche I found vendor sleaziness to be a much bigger problem and cloaking does nothing for that. It saves time and money though. It's so easy to change just one link it makes testing alternate offers a snap, not to mention still being able to profit from all the links out there (including PDF and desktop app based) when offer goes defunct. I roll my own redirects using .htaccess, sometimes in combination with PHP. Looking forward to hear what you do. mfartr.com
well i cloak affiliate links when i post on forums (maybe hosting affiliate links and something like that)