Sentence:  According to this saga of intellectual-property misanthropy, these creatures [patent trolls] roam the business world, buying up patents and then using them to demand extravagant payouts from companies they <WSD>accuse</WSD> of infringing them. Often, their victims pay up rather than face the costs of a legal battle. 
Meaning of the word marked with <WSD> tags:  to make an accusation against someone