I didn't make any comments about the appearance or work ethic of many of those who frequent car boot sales did I?
I fear your response infers your own innate prejudices.
No, it is the behaviour of a type of car booter that leads me to refer to them as "vermin".
Scrambling like flies on shit and tireless hassling to get something priced at only a few pence for nothing or next to nothing.
And it's not, as you presumed, limited to a certain appearance or class or wealth bracket. The 4 wheel drive, designer mums are scrumming with the worst of them.