Should there be limits for patent lawsuits?

Virgin has now won the n’th lawsuit from Rovi on EPG application in their boxes/network. Also Ziggo won cases against Rovi.

Rovi (previous Gemstar) is the self declared king of EPGs supported by many patents, now found to be frequently invalid. But they just keep on coming at you, which is what many organizations fear; and they just pay up. Just when turns “trying to get your rights acknowledged” turn into extortion, if only for the legal costs involved.

New victory for Virgin Media in Rovi patent battle.