Pretty much how the internet started to work once it was accepted that you can kick out people that don't agree with you from your online community. As a result of a culture of 'de-platforming' and censorship, what actually started to happen was that people started to platform "strawman" - intentionally misrepresented proposition that is set up because it is easier to defeat rather than engaging with an opponent's real argument - instead.
A person who scuttles along the platform as trains come to a halt, trying to be in front of the nearest door, giving the best chance of getting a seat. Sometimes results in humiliation when the train pauses then moves a few metres further, meaning the whole exercise was pointless for the crab. Hardcore commuters have the right to tut as this goes on, as of course they know exactly where the door will be and don't need to scuttle.
Whilst standing at Finchley Roadin the morningchatting to a friend as a crab approaches, "Damn here comes a Platform Crab, I'll just strategically place my briefcase here to end their scuttle"
The process of going to any (usually London) train station and rolling small change as far as you can down the platform without the coin falling into the track, while simultaneously avoiding other commuters.
When a software product, usually a video game is being developed for multiple systems (ex. playstation 3, xbox 360.) the devloper will often create the product on one then create a port, or reformatted version for the other. The system that the software is developed for first is the lead platform.
"The lead platform for Dragon Age Orgins was the PC and ports were created for the PS3 and the X Box 360