It’s the internet ....

I’d guess it’s as legal as including random big company names in the company’s front page, while promising interesting problems to solve with a culture valuing good life/work balance.

As long as there are no serious effects/money changing hand/contracts signed solely based on those, shouldn’t it be fine ?

Is it legal to lie? Obviously yes.

Just posting false information isn't. If you actually went through with conning someone into giving you a job or some other material benefit based on false information, it would be.

EULA doesn't define legality. That's stated by the state.

Illegal how? LinkedIn is no more official than fortnight.

I don't think it's illegal because I know a lot of people are doing the same thing. Mostly from marketing sectors. I have couple of clients who makes a lot of fake profiles.

It likely violates the Geneva Convention.

As long as you don't lie on the CV and the application you send in, it should be at least not illegal. Also, if you don't take a job. Would still get you fired so, I would assume. Not that OP has any of these risks, so.