Playing Devil’s Advocate it appears they’re attempting to squash blatant infringements on their property, which I can understand and respect:
"Addressing the example of an app developer which had already been told to change its name, King argued that the game in question had been deliberately designed to create confusion with Candy Crush.
“The particular app in this instance was called ‘Candy Casino Slots - Jewels Craze Connect: Big Blast Mania Land’, but its icon in the App Store just says ‘Candy Slots’, focusing heavily on our trademark.”
And they don’t appear as though they’ll push too heavily for legitimate uses of the name:
“We don’t enforce against all uses of Candy - some are legitimate and of course, we would not ask app developers who use the term legitimately to stop doing so.”
Source: Eurogamer.net
It all depends on how aggressively they pursue this and the ludicrous manner in which companies can trademark a single word - bizarre. However having seen some of the blatant rip-offs (particularly on Android) I can understand this stance.
Besides it’s cropped up a number of times; late last year a German board game manufacturer caused a stink by going after people that sued the term “Memory” - which is absolutely ludicrous. However checking on this there’s an article that dates back to 2009 on this:
http://theappencypress.com/2009/11/05/germany-gaming-company-ravensburger-abuses-trademark-law-apple-folds/
Re: Olympic, that’s one of the most fiercely protected trademarks in existence - up there with Coca-Cola and Star Wars, I remember enquiring about it’s usage many years ago in an editorial job, and was quoted ludicrous figures if I wanted to license its usage.
TLDR: Copyright/Trademarks are there to protect people - but at the same time are always open to be abused: always has been, always will.