And if I pressed you to the wall, pinky swear, cross your heart, the vast majority of you would have to admit there is no way you wouldn't use those shortcut against the traffic regulations
I swear on my mothers life that i never take shortcuts like those in the images you've posted, is that good enough?

Maybe that makes me the exception to the rule, maybe most cyclists do in fact ignore the highway code, i don't have any figures to back up any argument i could make.
What i do know is that the majority of road cycling enthusiasts on these forums do follow the rules.
I just popped to Tesco as my girlfriend is borrowing my car today (she works in central London so relies on the tube, no need for us to have two cars) and i made a point of making a mental note of all the mistakes i made and all the mistakes others made on my journey. This is a very quick and short 7.5 mile round trip:
My mistakes:
I missed a sunken cycle path under a busy roundabout (was really annoyed at myself for this!), but in my defence it wasn't signposted AT ALL until about 20m into it, but by that point metal bollards were blocking me from joining it, god knows why they put the sign there. I looked back while waiting in a traffic queue and the opening was absolutely tiny with faded green paint, basically so easy to miss. This is a point to v0n i guess as it shows how utterly useless our infrastructure is.
Cyclist mistakes:
Two way cycle lane, encountered cyclist with no helmet (personal annoyance) in the wrong lane.
Red light, cyclist bumps up onto the kerb, turns left, then rejoins the road.
Pedestrian mistakes:
Two young girls walking side by side holding hands in a two way cycle lane, the pedestrian footpath was right next to this. I haven't yet bought a bell that fits my new bike so i slowed right down and politely asked if i could get past them. Made them both jump which i felt quite guilty about as they're young and little mistakes like that are to be expected. Would like to stress though that at no point did i appear aggressive towards them, made a point of being very polite.
Slightly behind a small car on a narrow rural street, he was slowing frequently for speed bumps so for safety i was trailing him at a comfortable distance. Pedestrian turns quickly from footpath and crossed after car had passed without any indication he was planning to cross but failed to see me. He jumped out of the way when i heard my disk brakes slam on (still bedding in so they're very loud). Good reactions by him to be fair, though if he was slower we would have ended up in a heap on the ground. Issue i have with this is that he didn't look like he was planning on crossing at all, so there was nothing i could do to prepare for it.
Motorist mistakes:
Two very close overtakes, one of which i'm certain the wingmirror grazed my knee. The latter of which, somewhat ironically, i was in a cycle lane.
Car turning right across the road, failed to see me, fortunately i predicted this happening so managed to stop safely. Wasn't pleased as it was uphill and i was stuck in a high gear which is always a nightmare to get rolling again with.
Me turning right at a mini round-about, signalled very obviously with my shiny gloves that MJ himself would be proud of. Halfway around a car going straight on decided to pull out in-front of me causing me to slam on the anchors. Not entirely sure what she was up to as she seemed to wait until just the right moment to make things as scary as possible for me without killing me. May or may not have sarcastically shouted 'Thank-you!' at her, feel a little silly about that but she scared me good and proper.
Conclusion? Humans a morons? Dunno, inconclusive.
Tempted to keep a log of all infractions over the course of a year of cycling, i found it quite an interesting way to pass the time on that journey actually!
[EDIT] Ooooh, forgot one!
Motorist mistake:
Tesco car park. Car turns into one-way only lane the wrong way, then toots her horn at me for going in the correct direction. She was REALLY fat though so the jokes on her, fatty.