Martin, is your point that it's okay to break OPSEC here because others do on other sites?
Why is it okay at all, anywhere?
I suppose it depends on perspective. If you are safely on the ground and know about timings because you are close to the program, or know someone who is (and you want to impress the hell out of everyone), then you might be inclined to post with a certain abandon. Dr Pepper, and all that.
As a result of our free and capitalistic society members of the public have ready access to watches and cameras, amongst other things. Pretty sure some spotter watching from the provided area just off the A15 (N53 10'33 W 0 30'45) could just as easily post the info. Tough job making a 'plane the size of an RJ invisible in broad daylight and good weather.