Do you remember Chainmail? Everyone thought WotC was crazy to try and go head to head with Warhammer using more expensive metal figures. And they were right. Do you remember the WotC stores? WotC got it into their head that they'd make a national game-store chain. But to prevent their customers and distributors from rebelling, they charged top dollar and shorted their own stores for stock. Do you remember eTools? And on and on. Gleemax is the latest in series of unsuccessful ventures that, to outsiders, appeared to poorly thought out and poorly executed. Many fear that DDI is the next link in the chain.
I'm not saying that Chainmail, the WotC stores, eTools or Gleemax were destined for failure or even that they were bad ideas. They weren't. But their execution and planning was so faulty that they became spectacular failures...and much of it was preventable. In most cases, people both in and outside the company openly questioned these initiatives but were voted down or ignored (based on comments from ex-WotC employees made here and elsewhere). So part of what you're seeing/reading is probably just pent up frustration from folks who are tired of seeing good ideas offered to them and then watch as they go crashing to the ground in flames mixed with fear that its about to happen again with the DDI.