[bpicolo]

The only time I ever see the fullscreen message is when the screen has essentially already fullscreened itself in a case where I want it to. =/

[nfm]

The warning is a bit annoying, but without it attacks like this would be harder to spot: http://feross.org/html5-fullscreen-api-attack/ (it's just a proof-of-concept, no malicious payload)

[thaumasiotes]

Who are all these people who apparently run their browser maximized? Web pages generally get worse as the window gets wider. (Unless, of course, they control their own width, but that's its own obvious prompt to stop wasting all your screen space.)

[J_Darnley]

Only with a rubbish, widescreen display are modern websites crap. Get a nice 4:3 or 5:4 display and everything looks good when maximised.

[thaumasiotes]

No, it would still have to be a small squarish display. Fixing the aspect ratio won't fix the problem that you have way more space than the website will take.

[bpicolo]

That seems like an entirely inadequate warning for an average user to spot phishing anyway.

[rcthompson]

Then you probably haven't visited a phishing site that uses this technique.