No risk oh really
From the article "Obviously concerns that the LHC might destroy the world, unleash some form of interdimensional portal invasion etc are baseless".
The most important duty of the teckkies is to keep the beam on track.
Risk in ten easy steps:-
1 Nuclear fusion of hydrogen gas by energy beam, proven.
2 Lots of energy in beam of aging under funded facility. presumably the point of the article.
3 Grumpy scientists searching job ads (or protesting) not keeping eye on the job.
4 Beam with several mile punching power.
5 Lake Geneva in range (or wet earth aquifer under Geneva).
6 Thousands of tonnes of nuclear fuel to fuse when reaction gets going.
7 Blast to shake the planet (like slapping a soggy pudding cos most of it is molten).
8 Oceans slop around for a while and London gets a soaking.
9 Combine captured carbon in lake mixes with nitrogen in air to form cyanide (many types non-toxic)
10 Glucose sugar shortages fail to offset long term cyanide health effects like paralysis.
No risk. Sure apples and almonds and cassava fruit carry small doses of cyanide and pose little risk. Industrial chemical prussian blue (dark blue) is a cyanide. Stock up on the sweets, floaties and don't drink the blue liquid.