The concept of vexatious conduct is not understood in a purely subjective way under the Quebec regime. It is understood from the perspective of a reasonable person in the same circumstances. That is very important. Whether or not the conduct is considered vexatious depends from one person to another, but under Quebec's regime it is understood from the perspective of a reasonable person in the same circumstances. This criterion is widely used in other circumstances in Quebec civil law and has been incorporated here as well. Its application has not really been problematic.
On February 22nd, 2018. See this statement in context.