It's not exactly fair to call them out on BS that you think they are going to say. Besides, prices do drop over time, so high prices isn't going to be a valid excuse for pirating MW2.
it's not like he needs a crystal ball to see that
they always complain about piracy so it ain't going to change anyway...
whether or not they complain with reason is another subject ...
Also depends on what you imply by "valid excuse"
if a "valid excuse" is something that lets you avoid legal problems
then there is absolutely no "valid excuse" available at present
if a "valid excuse" is a moral standpoint then of course yes it is a valid excuse for those choosing to do that since a moral standpoint is rather personal and dependent on your own values or the ones you were taught... (for example in china, copying is a common practice which is not considered evil at all)
And prices do drop when they want it to drop, "The Sims" franchise is a perfect example of a license who never drops (or drops several years later)
Point is, in this world you have to not let companies step over one of your toes, otherwise they will start to trample both feet.
For example an uproar on forums might be taken seriously... or not
but a big sales hit talks to them
if people need to pirate it so as not to buy it and for the community to be heard then so be it!