In my opinion:
Using "they" means it provides additional information about all the RSC actors.
Using "those" would differentiate the actors with the beards, sandals, etc. to say which ones were disliked
Using "them" is incorrect grammar.
(And why is there a ' after RSC?)[/QUOTE
"The worthy residents of Stratford doubt that the theatre adds a penny to their revenue. They frankly dislike the RSC's actors, them with their long hair and beards and sandals and noisiness. It's all deliciously ironic when you consider that Shakespeare, who earns their living, was himself an actor (with a beard ) and did his share of noise-making." The paragraph is quoted from China's research student entrance test topic of comprehension for 2006. (In the above text there is Royal Shakespeare Company (RSC)).
Thanks to teachers, them giving their ideas!