I don't see how it's "entitlement" to control what your computer is doing with data it's receiving from the internet. If anything, I'd say it's the opposite site who is coming across entitled when they think not only they can expect to run any crap on user's machines, but also have the right to bitch about it when it doesn't run.

In that case, would you also say it's entitlement to be installing antimalware or security updates so malware authors are no longer able to run malware on your computer?