If it's not illegal to add, the only risk is bad press coverage, and it might prevent someone from suing in the first place because they don't know their rights.

Because sooner or later, some judge will decide it is enforceable.

Plus it serves as a deterrent for some from even filing a suit with the risk of it getting thrown out and them out thousands of dollars in legal fees.

to cover their asses. It's like seizure warnings on video games. it should go without saying but. sadly...it has to be said. if a case does arise, judges usually create a 'quasi' contract that's usually modified to be fairer for both parties...usually...😬

I'm guessing this might be a pre-emptive response to all the Snapchat lawsuits. Basically, parents are suing Snapchat because their kids talked to drug dealers using it.

Because enough people will read it without consulting a lawyer and never do so that pays for itself before the inks dry.