Complex sentence: Depsite Google's archiving of USENET groups, the Groups service does not seemingly respond to control messages, the means such messages generated by other USENET gateways, typically for abuse prevention or legal reasons are largely ignored.
Split into simpler sentences: Depsite Google's archiving of USENET groups, the Groups service does not seemingly respond to control messages. This means that such messages generated by other USENET gateways, typically for abuse prevention or legal reasons, are largely ignored.