Yes it is easy. Though I’m still torn with supporting them at all.
The thing I find most annoying is there is no way to copy even a small excerpt from an Amazon ebook (I’m sure it’s the same on Nook and iBooks). So, I’m reading some self help book and want to copy a list or form out so I can fill it out. Nope, not allowed, not even on their web based reader. Want to copy a recipe ingredient list to your shopping list? Nope. Not allowed.
I suppose I could DeDRM everything right after I buy it and use some other software to read.