What is the ruling on reading marriage vows written by someone who has decided to marry every female? Is this considered mockery? And is it permissible to do so if the reader does not take these vows seriously?

Marriage is not contracted by reciting these phrases. This is a frivolous act that has no consequences. The marriage contract has conditions and pillars without which it is not valid, including: the guardian, witnesses, the designation of the spouses, and the offer and acceptance in a single session.