Not completely impossible. During rush hour commute, the number of big SUV's isn't that great; after all, the drivers have to buy ga$$ for them and park them. Weekends and driving to resort areas is admittedly a different problem. Also, m/c commuters (rush hour type) are conditioned to keep a close watch and not ride like a squid - even if on a Duc or big 4 sportbike, and after enough encounters, the cage drivers seem to accept it. (If the cage has AZ or TX plates, though, watch out!)
Worst situation I ever experienced personally was leaving the SBK races at Laguna Seca. Traffic back to Silicon Valley and SF was very heavy and a camper and a duallie were determined to keep us bikes at bay. Ultimately we all formed into hunter packs. One or two would attempt to go up between, the road rage drivers would squeeze to prevent it, and a mob would pass on the right. (a few toward the median, also). The process continued.
Thinking back, I shiver slightly at the thought that the drivers were probably carrying, but didn't think to exercise their 2'nd amendment "rights" - well they consituted a Well Regulated Militia, didn't they?