Earlier quoted context omitted.
Operative section of GP's comment: > because they merely allowed another company with a similar name to exist reason for genericization: > lost legal protection as trademarks by becoming the common name of the relevant product or service
I'm not sure I see your point. It's a two step process (IANAL): 1) fail to defend your trademark, 2) broad usage becomes popular, so you lose your mark. Sure, you may not lose your mark without (2), but you don't get to (2) without (1) and your only opportunity to stop the process of losing your mark is at (1). So, MartinCron's claim is perhaps not invalidated by the list, since those names have the additional proper…
No, that's not how marks become genericized. Marks become genericized when the consumer's mind uses the mark as a word for the category rather than as a specific product/line/company. Defending your trademark in court doesn't actually help against genericization, there's no step 1 then step 2 there's only step 2. Step 1 is irrelevant.
> Is the idea that it is OK for SEOMoz to do nothing under the assumption that Doz will never become popular?
If "doz" became genericized, Doz would lose its mark, not moz.