The phrase "such prosecutions" refers to the act of officially charging and taking legal action against someone for committing a crime or offense. Full definition
The courts would probably take a dim view of such a prosecution, viewing it as petty. (law.stackexchange.com)
I, for one, would welcome such a prosecution. (judithcurry.com)
However in R v Bow Street Metropolitan Stipendiary Magistrate, ex p South Coast Shipping Co Ltd [1993] 1 All ER 219 it was held that the mere presence of an indirect or improper motive in launching a prosecution did not necessarily vitiate it; and the court would be slow to halt such a prosecution in the case of mixed motives unless the conduct was truly oppressive. (newlawjournal.co.uk)