Well...I had to try all the avenues at my disposal before capturing a trace of the guy's station on my spectrum analyzer then sending it off to the FCC with a note about who and what is causing the problem.
I can hook any number of legal 4w CB rigs up to one of my verticals, hook the Stoner, the CPI or a Drake R7...a Mackay Marine 3031A or (insert_favorite_high-end_RX_here) up to the other, transmit several channels away and simply not hear myself.
The neighborhood splatterbox, on the other hand, could be heard all the way into 10M on occasion from its normal CH32 hangout. I thought we (area hams) had solved this problem once but evidently the at-fault P-O-S Ranger 29xx product was merely sold or traded to someone else instead of being put on the bench and fixed.