Not surprising; the "Yes on Prop 8" folk ran a terrible campaign, full of lies, half-truths and misinformation.  Their FB page's Admin was fond of insults and nasty comments towards people seeking additional information.  The radio/tv/print ads were misleading at best.  And they distilled all of Prop 8 down to one issue - their bottom line, while forgetting that the revised Muni ordinance also greatly increases the availability of accessible cabs for people with disabilities, increases penalties for unlicensed drivers, and requires permit owners to operate a minimum number of hours per year.

Also:  Yellow Cab and Checker are currently charging below the max threshold they're allowed to by ordinance ($3/ flag, $3/mile). The Yes on Prop 8 Admin  (who is probably closely connected to the ATPOA) made some veiled threats that both dispatch companies would increase to the max allowed fare if their repeal efforts failed.  It works out to 10-20% increase if they do so.