A mischievous hacker who justifies his hacking by claiming the exposed security holes would have endangered the public, and who was originally mad that he could not market his own innovations due to his victim's overly-broad patents?
"Someone, Blok reasoned, was beaming powerful wireless pulses into the theatre and they were strong enough to interfere with the projector's electric arc discharge lamp."
Serious power! Remember this was before tuned circuits became common (google 'syntony oliver lodge'). Even allowing for the sensitivity of a balanced carbon spark gap, you need to move a carbon rod or have a magnetic field strong enough to change the position of the discharge. He must have been in the same building...
I recall reading about this event in Erik Larsons "Thunderstruck". The book includes a pretty interesting account of the fits and starts of wireless technology, if not overly embellished.
The tuning issue is one of many snags that Marconi ran into, and with a government contract on the line, he made no small effort to keep the technological troubles under wraps until solutions could be found.
This article paints Marconi in a really bad light. It seems like he was either not that bright or a liar to claim that people couldn't listen in to his specially tuned signals.
There aren't many single syllable verbs that end with an 'is' sound that doesn't end with a 'ss'. In fact, I think there are none. Outside of verbs, it's almost only names (and 'this'), so 'dis' would be a pretty rare way to spell a word in common use. I also think this is because it would appear natural to use the other new words derived from it, dissing and dissed, with the 'ss'. You don't need to use these forms with nouns etc. I think it's only normal for people to end up spelling it 'diss', especially as the original word it was derived from becomes less known.
That said, I am a second language English speaker and haven't even completed English as a second language in high school.
The more things change...