I won't quite boycott WotC, but this will influence my buying behaviour. I'll buy less books, will probably skip on all their adventures (in favour of pathfinder), and if they want me to give them money for their online thing, they'll have to provide stellar content practically for a song. Since they have a horrible track record with electronic game aids and, with this stunt here, have shown that they are perfectly capable of truly horrible actions, I feel I can't trust them with anything I would have to keep paying for (if I buy one of their minis or books, I got that mini/book. They can't demand it back or come over and paint the pages black. But they could pull the plug on their online thing at any time and then you'd probably be there with nothing to show for it!)
I'll also severely reduce the number of miniatures I'll buy (that was what I spent most money on recently, anyway.). I'll go from buying three whole cases to 2 at most. Maybe I'll skip cases as a whole and get whole sets off ebay (with spare common and uncommon sets to shore up the numbers where needed) or something like that. And who knows If I won't abandon the Wizards minis completely after Reaper's plastic minis are out?