Even though he may tell you that he has no intention of meeting these women and all he is doing is having conversations with these women to kill boredom, that is still not acceptable.
Even if he may never meet these women that he is interacting with online in real life, he is still at risk of developing an emotional attachment to one or more of them.
Girls and guys lie equally when it comes to online dating profiles.
The girls who do lie on their online dating profiles will often lie about their age and weight. The guys who do lie often lie about their height and income.
This all reflects back to how things are in the real world as far as what set of qualities are considered to be the most desired for both genders.