Looking at that list of advertisers, the one that stands out for me as an easy target for counter demonstrations and direct action is IHOP. For those so inclined, go into your local IHOP with ICE logos, make comments about La Migra and generally indicate that the location is going to be raided. Watch the staff run out the back door.
I heard a story once about a guy who used to pick up bunches of illegals looking for day jobs in front of the local Home Depot in Houston. He loaded them in the back of his pickup and drove around for about ten miles over the worse roads he could find before dropping them off in front of the then INS Headquarters and watching them scatter. Was that wrong? ;-)
Any iderr where I can locate an ICE hat? Will eagerly wear one to IHOP while dressed in a gobermet agent look.